Two Highly Recommend Articles (One a Draft) on Law Text Interpretation (7/10/26)

I write today to recommend two articles on interpretations of law text—Constitution or statute. Text interpretation is text interpretation. However, text interpretation by originalist/textualist leaning judges considers extra-text “history” leading to ratification of constitutional text in interpreting Constitutional text but reject such history (commonly called legislative history) for interpreting statutory text. (Why that difference I hope you ask?) For originalists in interpretation (often but not always textualists) the permissible tools are those that focus on the original public meaning or some variant of that to some imagined audience including as some fear “Joe the Ploughman” with arguably marginal reading skills generally or for law text. See Jack N. Rakove, Joe the Ploughman Reads the Constitution, or The Poverty of Public Meaning Originalism, 48 San Diego L. Rev. 575 (2011), here.

The first article addresses the effects of Loper Bright. Lindsay L. Clayton,  Defending Agency Actions After Loper Bright: Sea Change or the Same Old Beach? 74 DOJ J. Fed. Law. & Prac. no. 2, 49 (July 2026), here. An Appendix for the article is here. Ms. Clayton is Assistant Director in the Civil Division’s Tax Litigation Branch. The article is quite good in assessing the effects of Loper Bright on DOJ’s civil litigation. One would have to assume that, prior to publication in the DOJ’s house organ, the contents were vetted and approved by at least some of the attorneys in DOJ responsible for positions before the courts.

Some comments on Ms. Clayton’s articles:

The article repeats (pp. 50-51) the Loper Bright claim:

The decision criticized Chevron for requiring courts “to ignore, not follow, ‘the reading the court would have reached’ had it exercised its independent judgment” and for “demand[ing] that courts mechanically afford binding deference to agency interpretations.”

I believe that Loper Bright claim was false or, in any event, overstated what Chevron actually did. My claim is that Chevron allowed judges to apply (not defer to) an agency interpretation only where they were interpretive equipoise (same as ambiguity) where they could not decide whether the agency interpretation or the opposing interpretation was best or not best. In that zone of equipoise, courts were simply applying the agency interpretation as a default rule, like the rule of lenity; there were not deferring to an agency not best interpretation. I develop my claim further in an article for publication in the ABA Tax Lawyer sometime in the near future. But consider:

• For a succinct statement addressing Chevron’s meaning of reasonable interpretation and the latitude it gave courts to apply their own best meaning. See Jon Newman (respected 2d Circuit Judge), On Reasonableness: The Many Meanings of Law’s Most Ubiquitous Concept, 21 J. App. Prac. & Process 1, 83 (2021), here (“It would probably be too cynical to suggest that [under Chevron] the courts are just accepting agency interpretations with which they agree and rejecting those they disfavor, but in some cases that almost seems to be what is happening. Clearly there is no one meaning of “reasonable” in the context of Chevron deference.”)
• Judge Newman’s insight is consistent with empirical research of large data sets of cases that commoted about Chevron but none said or reasonably implied that the court deferred to a not best agency interpretation. Rather, Judge Newman was saying that the court determined a best interpretation and applied that interpretation or were in  interpretive equipoise. For my research, see Is Chevron on Life Support; Does It Matter? (Federal Tax Procedure Blog 4/2/22; 4/3/22), here; and Chevron Step Two Reasonableness and Agency Best Interpretations in Courts of Appeals (Federal Tax Procedure Blog 2/9/23), here. 
• Following through on my claim, the question is what courts do after Loper Bright do when they face ambiguous statutory text where they cannot honestly say that the agency interpretation or the opposing interpretation is the best? I cover that issue in my article addressing interpretive equipoise in percentage ranges, but just think about that. Keep in mind that Loper Bright cannot responsibly command or be interpreted to command that there cannot be ambiguity after applying all the tools of statutory interpretation.

CFC Invalidates GILTI Gap-Filling Regulation That Avoided Textual Statute Inconsistency (7/7/26)

In Keysight Technologies, Inc. v. United States, ___ Fed.Cl. ___ (7/2/26), the Court held invalid a Treasury Regulation designed to plug a gap in the statutory text. The opinion may be found: CFC here, TN here, GS here.

The Court opens with this sentence projecting the outcome (Slip Op. 1):

When Chevron fell, so too did the presumption that statutory ambiguity favors the agency. Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837 (1984), overruled by Loper Bright Enterprises v. Raimondo, 603 U.S. 369 (2024).

If that were not clear enough as to where it is going, the Court opens the next paragraph (bold face supplied by JAT):

This controversy relates to the Treasury’s self-inflicted fix of a mismatch between foreign subsidiaries with fiscal- or calendar-year tax filing requirements that Congress quietly built into the global intangible low-taxed income ("GILTI") statutory scheme.

And the next paragraph (bold face supplied by JAT):

The Treasury’s antipathy for this inconsistency resulted in the Secretary promulgating Regulation 1.951A-2(c)(5) ("the Regulation").

I won’t parse the quoted text any further (although my bold face may imply something).

The technical issue was whether Treasury could, by interpretive regulation, fix what appears textually to be a timing glitch producing materially different tax result based on differences in tax years between calendar year taxpayers and fiscal year taxpayers. As the Court says (Slip Op. 2): “Enactment of the TCJA created an inconsistency between treatment of certain taxpayers depending on whether they were fiscal-year or calendar-year filers.”

Basically, the taxpayer argued that it, as a fiscal year taxpayer, was entitled to a benefit that a calendar year taxpayer could not achieve. Without wallowing around in the details, it appears to me that an intuitive view of how Congress enacts tax legislation, one can fairly infer that Congress did not intend the result that the regulation sought to forbid and the Court blesses. Congress appears to have had no specifically articulated intent on the precise issue, but Congress generally does not make such distinctions to permit disparities between otherwise similarly situated taxpayers.

Tax Court Sustains IRS Interpretation for the Research Credit as Best Interpretation or, Possibly, with Loper Bright Deference from § 7805(a) (6/19/26)

In Smith v. Commissioner, T.C. Memo. 2026-50, TC No, 13382-17 here at #286 dated 6/16/26 and GS here, the Court sustained a regulations interpretation of the research credit over the taxpayers’ Loper Bright objections. Readers will recall that Loper Bright rejected Chevron deference for agency interpretations, exhorting courts to determine and apply the “best” interpretation. “Best interpretation” was not an inflexible command; Loper Bright permitted deference to agency interpretations when delegation was expressly or impliedly granted by Congress and courts might still find the agency interpretation persuasive under Skidmore.

A number of pre-Loper Bright cases sustained the applicable agency regulation by applying Chevron deference. In Smith, the taxpayers argued that (*30) “under the Supreme Court's landmark decision in Loper Bright, Treasury Regulation § 1.41-4A(d) is no longer the single best reading of section 41(d)(4)(H).”

One problem with the taxpayers’ argument was that prior cases had sustained the interpretation under Chevron. The Smith opinion mentions (*31) “statutory stare decisis” which Loper Bright expressly approved for pre-Loper Bright cases applying (or appearing to apply) Chevron deference. Smith concludes that discussion (*33):

           Thus, we find that the holdings in our prior cases and the aforementioned decisions of the Federal Circuit and Federal Claims continue to remain in effect. See Diversified Grp. Inc. v. Commissioner, Nos. 17038-18L, et al., 166 T.C., slip op. at 21–22 (2026); see also, e.g., Garcia Pinach v. Bondi, 147 F.4th 117, 121, 131–33 (2d Cir. 2025) (analyzing Loper Bright and the doctrine of statutory stare decisis and leaving undisturbed the holding of a prior panel opinion).

More importantly, Smith reasons (*33-*34, emphasis supplied by JAT):

          Moreover, we find respondent’s power to persuade argument compelling. In reaching a conclusion on the validity of a regulation we may give “[c]areful attention to the judgment of the Executive Branch.” Loper Bright, 144 S. Ct. at 2273. For the views of Treasury in this context “constitute a body of experience and informed judgment to which courts and litigants may properly resort for guidance.” Id. at 2262 [*34] (quoting Skidmore, 323 U.S. at 140). “The weight of such a judgment in a particular case,” of course, “depend[s] upon the thoroughness evident in its consideration, the validity of its reasoning, its consistency with earlier and later pronouncements, and all those factors which give it power to persuade, if lacking power to control.” Id. at 2259 (quoting Skidmore, 323 U.S. at 140); see also Varian Med. Sys., 163 T.C. at 106. Congress has delegated authority to Treasury under section 7805(a) to define criteria for Congress’s funded research exclusion found in section 41(d)(4)(H). Here, Treasury has exercised that authority and issued longstanding and favorable administrative guidance that offers both clarity and certainty for taxpayers.

Considering the foregoing, we conclude the regulatory requirements found in Treasury Regulation § 1.41-4A(d) used to determine whether research is funded are reasonably related to and otherwise consistent with the intent of section 41(d)(4)(H). Accordingly, we reject petitioners’ contention that the Supreme Court’s decision in Loper Bright undermines the prior decisions that relied on Treasury Regulation § 1.41-4A(d) and their effects as precedent in these cases. Further, we reject petitioners’ reading of the phrase “to the extent funded by any grant, contract, or otherwise” found in section 41(d)(4)(H) to mean only “a sum of money set apart for a specific objective” and likewise determine our reading of this phrase would not be as beneficial as the Treasury regulation requirements. In other words, we find no benefit to petitioners’ argument, should we be inclined to reject respondent’s reading of the Code for our own.

          On the basis of the foregoing, we decline to invalidate Treasury Regulation § 1.41-4A(d) and the requirements for determining funded research under section 41(d)(4)(H) incorporating both “contingent on success” and “substantial rights” elements.

As I read this, Smith is saying that, although the prior cases may have noised about Chevron deference and in some cases even appeared to apply Chevron deference, in truth and might pass muster under statutory stare decisis, the IRS interpretation was the “best” interpretation, passing muster under Loper Bright’s de novo interpretation imperative.

Smith muddles on the point of best interpretation by citing § 7805(a) as a Congressional delegation of interpretive authority for the substantive Code provision. Is Smith suggesting in citing § 7805(a) that the interpretive regulation was a delegation qualifying for Loper Bright deference? If so, since Smith seems to have determined the agency interpretation was the best, was the citation of § 7805(a) necessary or even appropriate?

One side note on § 7805(a): Throughout its history, § 7805(a) has been authority for interpretive regulations. That authority was muddled by those claiming that interpretive regulations when applied by courts using Chevron deference meant that the interpretive regulation was transformed into a legislative regulation. That claim was always nonsense (even when made by Justice Scalia); with the demise of Chevron deference, courts are free to get past the nonsense. 

D.C. District Court Vacates IRS Notice Limiting Test for Clean Energy Credit (6/18/26)

In Oregon Env. Council v. IRS, ___ F.Supp.3d ___ (D. D.C. 6/6/26), CL here and GS here, the Court rejected the IRS attempt to eliminate one of the tests the IRS had used to satisfy the “beginning of construction” dates for clean energy tax credits. For a long time, the IRS had Notices permitting “beginning of construction” to be tested under the “Physical Work Test” and the ”Five Percent Test” (or “Safe Harbor”). By Notice 2025-42, 2025-36, IRB 351 (2025), the IRS eliminated the Five Percent Test.

The Notice was based on the President’s Executive Order No. 14,315, titled  "Ending Market Distorting Subsidies for Unreliable, Foreign Controlled Energy Sources," directing the IRS to "take all action as the [Secretary] deems necessary and appropriate to strictly enforce the termination of the clean electricity production and investment tax credits under sections 45Y and 48E of the Internal Revenue Code for wind and solar facilities." Soon after the Executive Order but before Notice 2025-42, reacting to the Executive Order, “multiple interested parties,” filed comments. Some commenters urged the IRS to retain the existing tests, called the “Physical Work Test” and the ”Five Percent Test” (or “Safe Harbor”) or make any new test only prospective. Prominent Congressmen offered comments, some supporting the existing Tests. The IRS then issued Notice 2025-42, 2025-36, IRB 351 (2025) providing that the “beginning of construction” requirement will be based only on the Physical Work Test, thus eliminating the “Five Percent Test.”

The Plaintiffs (“a collection of governmental and private organizations”) sued alleging “that the Notice is harming them” in specific ways outlined in the opinion (but not relevant to this blog entry). Among the claims made was that the Notice violated the APA reasoned decisionmaking requirement for valid agency rules. See Motor Vehicle Manufacturers Ass'n of the United States, Inc. v. State Farm Mut. Auto. Ins. Co., 463 U.S. 29, 52 (1983).

After extensive analysis, the Court held (Slip Op. 49):

Notice 2025-42 falls short of these standards. The Notice’s elimination of the Five Percent Safe Harbor is a significant change in the IRS’s position on what it means to “begin construction” for purposes of clean energy tax credits. This changed position implicates “serious reliance interests,” which the agency actively invited by repeatedly restating its prior approach. See Encino Motorcars, 579 U.S. at 221–22. Although the record shows that the Defendants received clear warnings about those reliance interests before adopting the Notice, the agency failed to justify its decision to change course. Because neither the Notice nor the administrative record provides an explanation from which “the agency’s path may reasonably be discerned” in light of all the facts and circumstances, the Notice is arbitrary and capricious. See State Farm, 463 U.S. at 43.

On Legislative History—Supreme Court Faceoff Between Conservative and Liberal Justices with Comments (6/16/26)

In FS Credit Opportunities Corp.v. Saba Capital Master Fund, Ltd., 608 U. S. ____ (2026), decided June 22, 2026, SC here* and GS here**, the conservative and liberal Justices fussed about the proper role of legislative history in statutory interpretation. That fussing interested me because I had recently made substantial revisions to that fuss in my 2026 Working Draft of my Federal Tax Procedure book (Student and Practitioner Editions). I don’t think the fussing in FS Credit adds anything meaningful to the discussion, but it does offer a handy opportunity for those interested in the issue to be up to date on the Supreme Court’s views. So, I thought that, in addition to notifying readers and providing links to the Opinions, I would offer the current treatment of the issue from the Working Draft (due for publication on the SSRN platform in early August 2026). The Practitioner Working Draft (with text and footnotes) may be viewed or downloaded here. The Student edition is the Practitioner Edition text without the footnotes, so for readers generally I just copy and paste here the text only:

(5)    Legislative History in Statutory Interpretation.

           The pre-enactment history of enacted statutory text may be important in interpreting the enacted text (just as, for example, the history of the drafting and ratification of the Constitution may guide its interpretation). Relevant history is often discussed in two broad categories: Statutory History and Legislative History. (Actually, statutory history (defined below) is a subset of legislative history, but it is not uncommon to treat the two as separate categories.) Both types of history stop upon enactment of the statutory text being interpreted; at least conceptually, since the focus is on the meaning of the text upon enactment, there is no such concept as subsequent legislative history which at best would be comments on the meaning of the previously enacted text. (I return to subsequent legislative history below, beginning on p. 34.)

           Statutory history can include two broad categories: (i) enacted text only, including enacted text that has been revised by enacted text over time (call this category “enacted statutory history”); and (ii) the changes in the text of bills as they move through the legislative process to enactment (“drafting history”). Enacted statutory history considers only enacted text and any interpretive inferences that may be drawn from enacted text; drafting history also considers drafts of the text as it moved and changed through the legislative process. Textualists use enacted statutory history to draw inferences of enacted text meaning. Sometimes, textualists resort to drafting history treating it somewhat like enacted statutory history in drawing interpretive inferences.

           Legislative History includes all documents the legislature may have generated or considered in enacting the statutory text that might permit inferences as to the meaning of the enacted statutory text. Legislative history is the course of congressional consideration in identifying the need for legislation, drafting or revising the bills (the “drafting history” and statutory history for enacted statutory text), expressions by persons involved in the process as to how they understood the text of the bills, and the final statutory text. The principal sources of legislative history for statutes are the drafting history and the committee reports which I discuss below. (For tax legislation, the legislative history may also include proposals from Treasury (analogous to drafting history) and Treasury’s explanation of the proposals, most commonly along with Treasury’s annual budget request with tax proposals referred to as the Green Book.) Other sources include committee hearings, statements made on the floor of Congress in debating the legislation, and submissions to Congress by the executive branch. There is a long and substantial history of judicial use of legislative history in statutory interpretation, particularly in the tax area.

Interesting Concurring Opinion on Canons (or Maxims) of Statutory Interpretation (5/29/26; 6/1/26)

In Flight Options LLC v. United States, 177 F.4th 709 (6th Cir. 2026), CA6 here and GS here, the Court reversed a district court holding that Flight Options, a fractional-share jet company, was liable for withholding tax in the amount of $39 million on fixed fees it charged to pay for the overhead and management of its clients' private jets. The tax involved was the

7.5% excise tax on the “amount paid for” domestic “transportation by air,” 26 U.S.C. §§4261(a), 4262(a)(1), what the statute called a “ticket tax” at all relevant times of this dispute, id. §4261(e)(1)(C), (e)(5) (2012).

Although I do not plan to deal with the substantive merits of the withholding tax in issue, basically a high-level overview is that the tax is easily calculated, collected, and paid over for the travel that most of us experience on commercial airlines where the price of the ticket is all in for cover all associated costs to the airline of providing the air transportation (included quite indirect costs of management and even paying lawyers). Private-jet companies operate differently, not including all costs in a single fare but separately calculating and charging for its costs and profit. So, Flight Options, calculated, collected, and paid over only that ticket tax related to “usage charges for each flight a client takes, not to fixed fees it charges its clients for overhead and management of its fractional jet business.” The latter charges are the types of charges that commercial airliners build into the ticket fare and thus are, for commercial travel, subject to the ticket tax. In effect, the IRS attempted to require private-jet providers to include some of those charges in the base to which the ticket tax, and thus withholding obligation, applied, thus making the ticket tax more comparable in impact between commercial providers and private-jet providers. (Added 4:50 pm: To put that another way, for a pro rata tax, private-jet flyers pay less than commercial-jet flyers. Think about that.)

The Court of Appeals (Judge Sutton for a unanimous panel) rejects the IRS position the district court sustained. Of course, the issue is to apply the ticket tax designed with the commercial-jet model where all-in costs are included in the ticket price subject to the tax. As noted above, the private-jet providers separately state their costs (with separately stated costs including profit). The effect of the Court’s holding is that private-jet providers get a competitive advantage relative to commercial-jet providers. The Court confers that competitive advantage by deploying the favorite interpretive tool of literalist textualists—Dictionaries. Using those vaunted tools, the Court’s parsing of the tax indicated to the Court that the text was uncertain as to the liability—ambiguous, if you will—and thus it is improper to hold a third-party withholder for a liability that is uncertain. In the process the Court deployed two canons, called “relevant taxpayer canons”: (i) the Pro-Taxpayer Canon, called a general canon, that interprets uncertainty in tax liability in favor of the taxpayer and against the IRS; and (ii) a related canon, called a "specific canon," that to hold a party charged with collecting the tax for the IRS must have “precise and not speculative” instructions in the statute (meaning in his telling that ambiguity is resolved in favor of the putative withholder).

Re-Working the Chevron/Loper Bright Discussion in the FTP Books (Student and Practitioner Editions) (5/25/26)

I recently spent some time and mental energy on an article on Chevron and Loper Bright. Incident to rethinking the issues, I have decided to substantially reduce the space I devote to Chevron and Loper Bright in my Federal Tax Procedure Book working draft for the 2026 editions (due in early August on SSRN). I will first excerpt the current discussion offering more (particularly with footnotes) and print that discussion separately for publication on SSRN. I will then re-work the discussion to provide more compact summaries of the key points, hopefully keeping the discussion to 5 pages with footnotes in the Practitioner Edition of the book (the 2025 presented it as 9+ pages).

I thought I would use this effort to test some AI Tools on a short portion of the discussion that I am deleting from the FTP book. I took a portion of the introduction to the Chevron/Loper Bright issues (about 2+ pages in the Student Edition (pp.59-61) without footnotes. The 2026 working edition made some significant changes, so I used that for the AI tests. The draft that I asked the AI Tools for assistance may be viewed here. I tried it on several AI tools, but chose to work with the MS Copilot versions. I present Copilot’s reworking of that text here (various offerings). Probably the best choice is the following which Co-Pilot said was a “High-Impact” version (I have lightly edited the Co-Pilot version (my edits are marked in red):

For decades, Chevron stood at the center of administrative law—criticized, caricatured, and often misunderstood. In Loper Bright, the Supreme Court finally swept it aside. But the Court’s account of what Chevron was, how it functioned, and what the APA demands is not a restoration of interpretive purity. It is a reconstruction built on selective memory and an unwillingness to confront the APA text Congress actually wrote.

Chevron never required courts to embrace an agency’s inferior reading of a statute. Its reach was far narrower. Chevron operated only when a court, after exhausting the traditional tools of interpretation, reached a point of genuine ambiguity—a state of interpretive equipoise where the evidence did not permit a principled choice between competing readings. In that narrow space, Chevron supplied a tie‑breaker, not a theory of agency supremacy. The agency prevailed not because its interpretation was “better,” but because the court could not say that any interpretation was.

The APA itself contains the same tie‑breaking logic. Section 706(2)(A) authorizes courts to set aside agency action only when it is “not in accordance with law.” That language places the burden of persuasion on the challenger. If the interpretive evidence is evenly balanced, the challenger loses. The agency’s interpretation stands. This is not judicial invention; it is the statute’s own allocation of interpretive risk. Indeed, in Dobson (a unanimous 1943 Supreme Court opinion), interpreted “not in accordance with law” as a standard of review of statutory interpretation to require deference.

Loper Bright avoids this textual reality. It asserts that courts can always identify a single “best” interpretation, as though ambiguity were a judicial failure rather than an inherent feature of statutory language. Yet the Court simultaneously preserves Skidmore respect—a doctrine that presupposes ambiguity. The opinion cannot eliminate ambiguity and preserve Skidmore at the same time.

This chapter begins from a simple but unavoidable truth: ambiguity exists, and when it does, the APA—not Chevron—provides the tie‑breaker. Loper Bright may have the authority to overrule Chevron. What it lacks is the authority to rewrite the APA or to pretend that interpretive uncertainty can be willed away. The real work of statutory interpretation lies in confronting ambiguity honestly, not denying its existence.

Further on Murrin and Allen and the Unlimited Statute of Limitations for Fraud on the Return (4/30/26)

I read earlier this week an excellent article on Murrin v. Commissioner, 158 F.4th 527 (3d Cir. 2025), here, cert petition pending (see here). Bryan Camp, The New Forever Rule for Record Retention (Tax Notes March 3/25/26), here. Professor Camp is concerned, as he was in filing an amicus brief in Murrin, with the potential application to innocent taxpayers of § 6201(c)(1)’s unlimited statute of limitations for a “false or fraudulent return with the intent to evade tax.” Murrin held that the taxpayer’s fraud is not required and that a return preparer’s fraud would suffice to apply the unlimited statute of limitations for fraud. For further on Murrin, see my post Third Circuit Holds Taxpayer Fraud is not Required for 6501(c)(1) Unlimited Statute of Limitations, Creating Conflict (Federal Tax Procedure Blog 8/18/25; 10/17/25).

In an alarmist mode, Professor Camp concludes his article by stating that, unless the problem of § 6201(c)(1) applying to innocent taxpayers is fixed, “I think we must all advise our clients to keep their records . . . forever.” (Emphasis supplied.) What does forever mean in this context? That's a quibble. Professor Camp is not just content to provide that bottom line from Murrin but repeats his arguments in his amicus brief as to error in Murrin and the predicate tax court opinion in Allen v. Commissioner, 128 T.C. 37 (2007), here.

I encourage those interested in the issue (which I call the Allen issue) to read Professor Camp’s article. I have not recently stepped through the legislative and statutory history he discusses in support of his claims, but my recollection is that I was not then sure that they support his claims. In any event, I am sure that for a long period of time since the early tax law, practitioners, including me, assumed that § 6201(c)(1) required taxpayer fraud. Allen appeared out of the blue, so to speak. But now that, in Justice Kagan's words “we are all textualists now,” if we focus on the text of § 6201(c)(1), there is no textual reading that would limit its scope to taxpayer fraud if the fraud is on the return. In other words, at best regarding Professor Camp's claims, the actual text is ambiguous as to whether the text of § 6201(c)(1) requires the taxpayer's fraud.

Further, on the purpose of § 6201(c)(1), I do not conceive it is as a punishment provision but a recognition that fraud on the return makes discovery by the IRS more difficult. After all, the consequence of the unlimited statute of limitations is that the taxpayer pays the tax the taxpayer owed ab initio. True, the taxpayer may have to pay interest, but tax and interest are not penalties. The taxpayer Professor Camp is concerned about is the truly innocent taxpayer relying on a fraudulent preparer; for such a taxpayer there will be no penalty because (i) § 6662 civil penalty which does not apply with taxpayer reasonable cause (unless, for some § 6662 civil penalties, the reasonable cause exception does not apply which is not likely in an innocent taxpayer context) and (ii) § 6663 civil fraud penalty does not apply unless taxpayer fraud is involved. So, from that perspective, the truly innocent taxpayer suffers no penalty with respect to the fraud on the return; rather, he would just pay the tax and interest that are in the helpful metaphor, his dues for a civilized society.

That’s all I have on the merits of Murrin and Allen. Just a few more comments:

Interesting points from ABA Tax Online Presentation on Loper Bright (4/29/26)

I just attended online an ABA Tax Section Program titled: “Navigating Tax Guidance in a Post-Loper Bright World.” The ABA page on the program is here. The panel participants were very knowledgeable.

Early in the program, I asked the following question via the Q&A tool:

Under Loper Bright, if, after using all the tools of statutory interpretation, a judge still cannot determine whether the IRS interpretation or the opposing interpretation is the best interpretation (a state of equipoise on the interpretation), what does the judge do? Should the judge flip a coin, consult, his ouija board, follow his own preferred outcome, etc.?

I have asked a similar question in previous ABA programs, but the question was never answered. In today’s program, the question was answered—that is, at least an answer was proffered. I am not sure it is the right answer but it certainly echoed Loper Bright’s reasoning, such as it is.

So what was the answer? Basically, the answer given by the judge on the panel was that, with good statutory interpretation, the judge will always have something to tilt the judge to the best interpretation. (That is my paraphrasing and advanced apologies if I did not get it exactly right.) Actually, as the question was answered, I think the answer was hedged saying that he did not think it would happen very often (although that is from memory, I may be misremembering, and my notes don’t confirm that).

I think the essence of the answer was an echo of Loper Bright which is just flat-out wrong on the point of continuing possibility of ambiguity (equipoise). Loper Bright claimed by fiat that a judge should always be able to reach a single best interpretation with no need for a default rule such as Chevron deference to the agency interpretation. (For this, one must remember that a condition of Chevron deference was that the statute be ambiguous, meaning that the judge could not determine whether the agency interpretation or an opposing interpretation was the single best interpretation; if the court could determine the best interpretation, Chevron required the court to stop at Step One without any deference.)

District Court Invalidates and Vacates Listed Transaction Reporting Regulation (4/18/26)

In Drake Plastics Ltd. Co. v. IRS, ___ F. Supp. 3d ___ (S.D. Tex. 4/15/26), CL here, and GS here, the court (Judge Lee Rosenthal) considered APA claims of invalidity of the regulations determinations of “transactions of interest” and “listed transactions” for micro-captive insurance companies (from the conclusion):

          The court grants in part the plaintiffs’ motion for summary judgment and a permanent injunction, (Docket Entry No. 58), and grants in part the defendants’ cross-motion for summary judgment, (Docket Entry No. 63). The defendants (1) appropriately designated micro-captive transactions as transactions of interest through 26 C.F.R. § 1.6011-11; but (2) exceeded their statutory authority in designating micro-captive transactions as listed transactions through 26 C.F.R. § 1.6011-10. The court declares unlawful 26 C.F.R. § 1.6011-10 and vacates it. The case is remanded to the Department of the Treasury and the Internal Revenue Service for further agency action consistent with this opinion.

          The vacatur is stayed until May 1, 2026, to avoid taxpayer confusion on Tax Day. Cf. Purcell v. Gonzalez, 549 U.S. 1, 4–5 (2006) (“Court orders . . . can themselves result in . . . confusion . . . .”). Final judgment is entered separately.

I am not sure what the last paragraph stay is about, but I do understand the holdings in the first paragraph.

The court’s holding turns upon interpretation of the statutory requirement that "transactions of interest" have the “potential” for tax avoidance but that “listed transactions” that have tax avoidance, at least presumptive tax avoidance, rather than just the potential for tax avoidance. The court reasoned that the IRS did not adequately explain microcaptive arrangements identified in the "listed transaction" regulation.

Judge Rosenthal is a very good judge, so I respect her analysis, even though I am not convinced that it is correct.

Microsoft Copilot AI Hallucinates on Chevron Deference (4/12/26)

I have previously written on artificial intelligence (“AI”) related to tax procedure issues. I write today to address AI hallucinations of the type that have been incorporated into briefs and, more rarely, even court opinions. By hallucinations, I mean (from Wikipedia, here): “a response generated by AI that contains false or misleading information presented as fact.” The specific instance I address here is false readings of judicial opinions in the context of Chevron deference.

Readers will recall that I have previously discussed the issue of Chevron deference and the demise of Chevron deference in Loper Bright. One of the issues I addressed but return to today is whether courts determined the best interpretation was an interpretation other than an agency interpretation but nevertheless deferred under Chevron to the agency not-best interpretation. My claim was that Chevron required statutory ambiguity which meant that the court could not determine the best interpretation; only when ambiguity existed could the court defer to (apply) the agency interpretation. Stated otherwise, if a court could determine the best interpretation, the statute was not ambiguous and the best interpretation applied at Chevron Step One (i.e., no deference to the agency interpretation). Extended, the claim is that courts did not defer to an agency interpretation when it was not the best interpretation; rather, courts only deferred when they could not determine the best interpretation. At least that is how Chevron should have worked.

Yesterday, I returned to AI, specifically MS Copilot, to address this issue. I link here for download an pdf from an MS Word file with my prompts (4 prompts with prompts 2-4 following through on the first prompt). I provide here prompts 1-4 which refine the inquiry and provide the Copilot response only to the final prompt:

PROMPT #1: can you please identify cases decided under Chevron in which a court explicitly stated its best interpretation and said that it was nevertheless deferring to a not-best agency interpretation?

PROMPT #2 Please provide direct quotations from each case.

PROMPT #3: Please provide pinpoint citations for each case. [JAT Note: pinpoint citations are local page cites.]

PROMPT #4: Please provide cases and quotes from cases where judges criticized Chevron for forcing them to accept worse interpretations.

I will copy and paste the answer to Prompt #4, but first a big red flag was presented in the response to PROMPT #2 when I asked for direct quotes. The response started with the following:

I can absolutely give you direct quotations, but there’s one important constraint: I can only quote one or two lines verbatim from each case, because judicial opinions are copyrighted. 

That claim is patently wrong. Case opinions are not copyrighted.

The following is Copilot's response to PROMPT #4 (I add some of my analysis in CAPS and RED TYPE with links to the cases):

COPILOT RESPONSE TO PROMPT #4:

Update on FTPB Discussion of Legislative History (3/18/26)

I have substantially revised the legislative history discussion in my Federal Tax Procedure Working Draft for the 2026 editions (Student and Practitioner) to be published on SSRN in early August 2026. As currently revised, the text (without footnotes as it will appear in the Student Edition, although those wanting the draft with footnotes in the Practitioner Edition may view it here):

                                      (5)    On Legislative History.

          I noted above the controversy between textualists and purposivists over the role that legislative history should play in statutory interpretation. Legislative history is the course of congressional consideration in identifying the need for legislation, drafting or revising the bills (the “drafting history” for enacted statutory text), expressions by persons involved in the process as to how they understood the text of the bills, and the final statutory text. The principal sources of legislative history for statutes are the drafting history and the committee reports which I discuss below. (For tax legislation, the legislative history may also include proposals from Treasury (analogous to drafting history) and Treasury’s explanation of the proposals, most commonly along with Treasury’s annual budget request with tax proposals referred to as the Green Book.) Other sources include committee hearings, statements made on the floor of Congress in debating the legislation, and submissions to Congress by the executive branch. There is a long and substantial history of judicial use of legislative history in statutory interpretation, particularly in the tax area.

          Legislative history is a broad term, with some legislative history more persuasive than others (at least for those willing to consider legislative history). In terms of the legislative process and reliable indicators of the meaning of statutory text, the committee reports accompanying legislation are generally viewed as a reliable form of legislative history (eclipsed only by conference committee reports discussed below). In both houses, proposed legislation is generally first considered substantively in committees which generally give the most detailed consideration of proposed statutory text; those committees often hold hearings to discuss legislative proposals and then prepare reports explaining the proposed statutory text that they send to the floors of their respective Houses. The meaning of particular statutory text that is then enacted may be discussed in those hearings or in the committee reports.

          For tax legislation, because of the historic influence of the tax writing committees and their staffs and the assistance of the Joint Committee on Taxation (“JCT”), the committee reports of the House Ways and Means Committee and the Senate Finance Committee have been the most frequently used legislative history guide to interpreting the statutory text. Often said to rank even higher than committee reports in authoritativeness is the particular form of legislative history accompanying and explaining statutory text produced in a Conference Committee to work out differences in legislation between the two Houses of Congress. In considering legislative history in a particular case, it is important to understand the legislative processes that produced the legislative history and whether those processes make the legislative history a reliable indicator of the actual or deemed meaning of the statutory text.

Comments on Highly Recommended Article Extending Skidmore "Deference" Approved in Loper Bright (3/7/26; 3/8/26)

I have just read a great article: Mitchell Zaic, Note: The Skidmore Compromise: Interpreting Skidmore as a Tiebreaker to Preserve Judicial Wisdom in the Era of Loper Bright, 110 Minn. L. Rev. 1535 (2026), here, and post some thoughts on the article and on Skidmore (Skidmore v. Swift & Co., 323 US 134 (1944), here).

First, I acknowledge Mr. Zaic has published an exceptional work with substantial research and creative thought after Loper Bright Ent. v. Raimondo, 603 U.S. 369 (2024), SC here (Preliminary Print), which overruled so-called Chevron deference. Chevron U.S.A. Inc. v. Nat. Res. Def. Council, Inc., 467 U.S. 837 (1984), GS here. Mr. Zaic says in the asterisk for his name: “Writing this piece has been one of the great privileges of my life.” He has also privileged readers of the article.

Mr. Zaic states his thesis in these two excerpts (pp. 1356 and 1569):

This interpretation of Skidmore would only be used by interpreters when judges are faced with interpretive ties that have no other method of resolution. Only then can judges resort to applying the agency's interpretation. This method of interpreting Skidmore ensures that agency interpretations never overrule the best meaning of the statute, instead facilitating the judge in his or her interpretive quest. In addition, the tiebreaker continues the long tradition of respect for agency interpretations beyond that of the typical litigant.

* * * *

Where competing interpretations are at equipoise to an interpreter, courts should resolve conflicts in the agency's favor so long as the agency's reasoning is valid, thorough and its interpretation arises from experience and informed judgment.

Bottom line, Mr. Zaic argues that, in a state of statutory interpretive equipoise, a court needs—indeed, must—apply a default rule to decide the case. The default rule in a case where a regulated party opposes an agency interpretation is that the court should default to the agency interpretation. Mr. Zaic gets to his conclusion through a process of reasoning.

My previous Chevron research indicates that Chevron worked in equipoise (without necessarily the qualifiers at the end of Mr. Zic's last sentence). Chevron was supposed to apply only where, after vigorous statutory interpretation (Chevron fn. 9), the statutory text was still ambiguous—in equipoise—where the court could not determine which of two or more interpretations within the zone of ambiguity was the best interpretation.

On Supreme Court U.S. (or is it U. S.) Citations and the Supreme Court's Tariff Opinions (2/22/26; 2/23/26)

This blog entry is a bit of a detour from the domain of federal tax procedure. Specifically, this blog presents two more or less fringe disparate subjects. I divide the blog into two sections. The first is mundane: whether to space or not to space between U. and S. in Supreme Court citations? The second is a disjointed foray into the Supreme Court’s tariff opinions handed down Friday:  Learning Resources, Inc. v. Trump, 607 U. S. ___ (2026), here (Slip Op.).

To Space or Not  to Space in U.S. (or it is U. S.) Citations, that is the Question

For those who review Supreme Court opinions in all official formats (Slip Opinion, Preliminary Print, and Final), the opinions format the citation to the official reports with a blank between U. and S.—e.g., Loper Bright Enter. v. Raimondo,  603 U. S. 369 (2024), here (Preliminary Print). I had not learned to cite without the space and had not paid attention to the Supreme Court's format (with space) until today as I was reading the slip opinion in Learning Resources, Inc. v. Trump, 607 U. S. ___ (2026), here (Slip Op.). So, I asked ChatGPT and received the following answer (with my prompt, with citations omitted):

Prompt: Please cite me authorities (judicial and otherwise) that discuss the difference between the Supreme Court's citation of its decisions as "U. S." (with a blank between U. and S. and other authorities (mostly commentary but also Courts of Appeals and case reporters) foregoing the blank between U. and S.

Chat GPT Response: 

The U.S. Supreme Court officially cites its own decisions using "U. S." with a space between "U." and "S." in the United States Reports (e.g., 5 U. S. 137), while The Bluebook, Courts of Appeals, most legal commentary, and case reporters standardize "U.S." without the space. This distinction arises from the Court's unique style conventions versus modern citation guides like The Bluebook, which enforce no space between adjacent single capital letters per Rule 6.1(a).

Supreme Court Practice ("U. S." with space)

The Supreme Court itself uses spaced citations in its bound volumes of the United States Reports, reflecting historical typography from early volumes like Marbury v. Madison, 5 U. S. (1 Cranch) 137 (1803).8 This format appears consistently in official reporter headings and the Court's published opinions.

Other Authorities ("U.S." without space)

The Bluebook: Prohibits "U.S." with a space, mandating "U.S." for United States Reports (e.g., Roe v. Wade, 410 U.S. 113 (1973)); spaces are reserved for abbreviations like "S. Ct." (Rule 6.1(a) and Table T1).

Courts of Appeals and State Appellate Guidance: U.S. Courts of Appeals briefs require "U.S." without parallels or spaces (e.g., Roe v. Wade, 410 U.S. 113 (1973)). California Courts of Appeal cite as "450 U.S. 544." Washington Supreme Court style sheet specifies "__ U.S. __" without space in examples.

Fifth Circuit Claims a Pro-Taxpayer Canon When the Court Should have Interpreted the Exemption in the Statute Fairly or Applied the Anti-Taxpayer Canon (1/27/26)

I posted much of the information in this blog entry at the bottom of the immediately preceding blog: Fifth Circuit Knows a Limited Partner When Reads It (1/24/26; 1/27/26), here. I decided that the information should not be buried in the prior blog but should be lifted into it’s own blog entry. So here it is. For context, yesterday’s blog was about the Fifth Circuit’s opinions in Sirius Solutions, L.L.L.P v. Commissioner, ___ F.4th ___ (5th Cir. 2025), CA5 here and GS here, which held that the limited partner exception in § 1402(a)(13) does not apply to earnings allocated to a nominal limited partner even though providing services to a limited partnership. Please note that I bold-faced exception because that the majority and the dissenting opinions agree it is an exception to the general rule of taxation. (In view of this blog entry, I have eliminated the information from the bottom of the prior blog entry.)

I ask readers to consider seriously footnote 8 of the majority Sirius majority opinion  spanning Slip Op. 23-24):

  n8 Even if the IRS and Tax Court’s arguments had persuasive authority, they would at most establish ambiguity. But that is not enough for the Government’s passive investor rule to prevail. It is a “longstanding canon of construction that if the words of a tax statute are doubtful, the doubt must be resolved against the government and in favor of the taxpayer.” United States v. Marshall, 798 F.3d 296, 318 (5th Cir. 2015) (quotation omitted).

First, Loper Bright claims (I think nonsensically) that courts can always interpret out ambiguity in the statute. See e.g., Chevron, Loper Bright, and Statutory Ambiguity (Federal Tax Procedure Blog 1/8/26; 1/9/26), here.  If there is genuine ambiguity where the court is unable to determine the best interpretation between two or more interpretations within the zone of ambiguity, the court will need a tie-breaker which artificially resolves the ambiguity to decide the case. Chevron offered such a tie-breaker, but Loper Bright rejected Chevron without substituting any other tie-breaker. Of course, the alleged "longstanding canon of construction the majority claims in footnote 8 could supply a tie-breaker in the majority's imagination. I address here the validity of the majority's claim of this "pro-taxpayer" canon of construction.

Canons of statutory construction  are “rules of thumb that help courts determine the meaning of legislation.”  They are said to “limit judicial discretion and render statutory meaning more predictable.”  E.g., Jonathan H. Choi, The Substantive Canons of Tax Law, 72 Stan. L. Rev. 195, 228-229 (2020), here. On the other hand, they are said to be “readily manipulable and [frustrate] the policy preferences of Congress.”  Karl Llewellyn famously observed that “there are two opposing canons on almost every point.”  

A variation on the theme is that maxims, which may function like canons, might be viewed as minims because they reveal so little and are "singularly unhelpful when it comes to deciding cases." United States v. Ingredient Technology Corp., 698 F.2d 88, 94 (2d Cir. 1983)

Professor Choi notes that the opposing canon  (called an anti-taxpayer canon) is to construe exemptions from tax against the taxpayer who cannot show that the statute requires the exemption. (See Choi, pp. 251-254.) Furthermore, Choi notes that the pro-taxpayer canon is not now in vogue. (See Choi, pp. 253-254, quoting Scalia and Garner arguing for applying the fair meaning of statutes; in any event, the anti--taxpayer rule for tax exemptions, "has been sufficiently widely validated and cited that, in my view, its place among the substantive canons is secure" and "the courts have widely embraced this canon." So, the mere fact that the majority felt the need, albeit in a footnote, to use the dubiously applicable pro-taxpayer canon instead of a fair meaning of the statutory exemption or the anti-taxpayer rule, is suspect.

Fifth Circuit Knows a Limited Partner When Reads It (1/24/26; 1/20/26)

Most readers of this blog will already have heard of or even read the opinions (majority and dissenting) in Sirius Solutions, L.L.L.P v. Commissioner, ___ F.4th ___ (5th Cir. 2025), CA5 here and GS here, Basically, the majority held that the limited partner exception in § 1402(a)(13) does not apply to earnings allocated to a nominal limited partner. Bottom-line that interpretation means that partners providing services to a partnership can escape the Social Security and Medicare tax on income they allocate to their limited partner interests even though that income is really the return on their personal services. The Tax Court held otherwise in the Tax Court phase of Sirius, based on Soroban Capital Partners LP v. Commissioner, 161 T.C. 310 (2023).

I do not plan to get deeply into the merits of the majority and dissenting opinions. Two reasonable articles are Jon Endean, Reflections on the Fifth Circuit’s Ruling on Limited Partner Exception (TaxProf Blog 1/21/26), here; and Maureen Leedy, Fifth Circuit Reverses Tax Court on Limited Partner Self-Employment Tax (ThomsonReuters 1/21/26), here.

On the merits, I do say that, it seems to me, the difference between the majority and the minority is that the majority is not practical in being a faithful agent to Congress and the minority, like the Tax Court, is more practical in being the faithful agent.

JAT Comments:

1. I think it relevant, at least at the margins, that the two judges in the majority are Trump appointees and the judge in the minority is an Obama appointee.

2. The differences in statutory interpretation driven by ideologies and, for the majority, simplisms is stark. A good example is the majority’s claim “legislative history is generally of dubious value in statutory interpretation” and the follow-through that “where, as here, textual arguments yield a clear answer, judges must stop.” (Slip Op. 19; cleaned up with internal quotations marks and citations omitted.) I think originalists have beat that horse beyond its ability to persuade; why is not Congress’ view of the legislation it enacted relevant to interpreting the legislation? If one takes the view, as I do, that interpreting the law is an exercise like fact-finding (see Chevron, Loper Bright, and Statutory Ambiguity (Federal Tax Procedure Blog 1/8/26; 1/9/26), here)), then why would not relevant evidence be considered for whatever persuasive value it might have?

Chevron, Loper Bright, and Statutory Ambiguity (1/8/26; 1/9/26)

Added 1/9/26 9:00pm: I would really appreciate readers notifying me of any case(s) they have read where the court said that it determined the best interpretation and nevertheless deferred under Chevron to a not best agency interpretation. Please respond either by comment or by email to me at jack@tjtaxlaw.com.

I start with two opposing statements:

“Chevron requires a federal court to accept the agency's construction of the statute, even if the agency's reading differs from what the court believes is the best statutory interpretation.” National Cable & Telecommunications Assn. v. Brand X Internet Services, 545 U.S. 967, 980 (2005) (Thomas, J. for the Court).

ChatGPT’s response to the following question: “Can you find me a United States case where the court determined the best interpretation of a statute but nevertheless applied Chevron to defer to a not best agency interpretation?”:

No United States case is identified in the provided search results where a court explicitly determined the best interpretation of a statute but nevertheless applied Chevron deference to a non-best agency interpretation. * * * * The results highlight Chevron's requirement for courts to defer to reasonable agency views of ambiguous statutes but provide no instance where a court labeled its own view "best" yet deferred anyway, likely because such language would contradict Step One's mandate to enforce unambiguous meanings.”

[JAT Note in support of ChatGPT’s response: I have read many Chevron cases and do not recall that a court ever said it had determined than interpretation other than the agency's was best but deferred to the agency interpretation. At an anecdotal level, I read cases identified by other scholars as Chevron cases and found that not one of the cases said the court determined the best interpretation was other than the agency interpretation and nevertheless deferred to the agency interpretation. See Is Chevron on Life Support; Does It Matter? (Federal Tax Procedure Blog 4/2/22; 4/3/22), here (focus on Category 5); and  Chevron Step Two Reasonableness and Agency Best Interpretations in Courts of Appeals (Federal Tax Procedure Blog 2/9/23), here (again focus on category 5). In not of those cases did a court state or fairly imply that it had determined a best interpretation and was deferring to the agency interpretation instead. Not one.]

I propose that (i) Chevron deference, properly applied, was a tie-breaker rule when a court found statutory text ambiguous as required to get past Step One (meaning that the court could not determine the best interpretation) and (ii) that Loper Bright’s rejection of Chevron deference leaves courts without guidance to resolve ambiguous statutory text. Of course, the phenomenon of statutory interpretive ambiguity is not unique to agency interpretations of statutes they administer, but at least Chevron offered a consistent and, in a sense, principled way to resolve ambiguity to reach a decision in the case at hand.

Statutory Interpretation as a Continuum and Equipoise in the Continuum (12/20/25)

Continuing on my exploration of AI (I am still a novice), I asked several AI tools about ambiguity and continuum of confidence in statutory interpretation as a way to think about when ambiguity does not permit a court to determine the best interpretation to the required confidence level (in percentages say 51%, 60%, 67%, etc.). I offer here the best of the AI outcomes (from MS CoPilot) with both text and footnotes indented and then make a few comments.

Below is a polished, law‑review‑style Part II that builds naturally on your Part I. It is structured, argumentative, and footnoted in proper Bluebook form. If you want, I can later add subparts (A, B, C), case studies, or integrate it into a full article.

II. The Ambiguity Continuum in Judicial Practice

Courts frequently describe statutory text as either “clear” or “ambiguous,” but this binary framing masks the far more nuanced reality of interpretive practice. In actual adjudication, judges encounter not a dichotomy but a continuum of ambiguity, ranging from provisions whose meaning is overwhelmingly apparent to those whose linguistic indeterminacy leaves multiple interpretations equally plausible.¹ Judicial methodology—whether textualist, purposivist, or something else—does not eliminate this continuum; rather, it structures how judges navigate it. Understanding this spectrum is essential to explaining why interpretive disputes persist even when judges purport to apply the same tools.

A. The Myth of Binary Clarity

The conventional judicial rhetoric of “plain meaning” suggests that statutory clarity is a threshold condition: either the text speaks for itself or it does not.² Yet linguistic theory and empirical studies of judicial behavior demonstrate that clarity is rarely self‑evident.³ Even seemingly straightforward provisions often contain latent ambiguities that become visible only when applied to specific factual contexts.⁴ As Justice Kagan has observed, “we’re all textualists now,” but textualism itself requires judges to make fine‑grained judgments about how much clarity is enough.⁵

These judgments are not mechanical. They depend on context, background assumptions, and the judge’s own interpretive priors.⁶ A provision may appear clear to one judge because she reads it against a particular linguistic or structural backdrop, while another judge—equally committed to textual fidelity—may find the same provision ambiguous.⁷ The very act of declaring a statute “clear” is thus an interpretive conclusion, not an objective fact.

B. Degrees of Ambiguity and the Use of Interpretive Tools

As ambiguity increases along the continuum, courts predictably rely more heavily on interpretive tools to resolve uncertainty. Textual canons, for example, function as probability‑adjusting heuristics: they shift the likelihood of one interpretation over another by appealing to linguistic conventions, structural coherence, or background norms.⁸ Legislative history, when used, serves a similar function by providing additional evidence about how Congress likely understood the statutory language.⁹ Substantive canons—such as the rule of lenity, the presumption against retroactivity, or federalism clear‑statement rules—operate at the far end of the continuum, where ambiguity is so deep that ordinary interpretive tools fail to produce a dominant reading.¹⁰

Tax Court on Default Rules in Statutory Interpretation-Herein Also of Chevron, Loper Bright and APA § 706(2(A) (11/14/25)

In Apache Corp. v. Commissioner, 165 T.C. ___ No. 11 (11/1325), reviewed opinion, the Court addressed the momentous (to some) issue of whether a taxpayer electing not to carryback some categories of net operating losses (NOLs) can reserve in the election to carryback other categories of NOLs. The opinions in Apache may be viewed on the Tax Court Docket Sheet for Case # 25984-22, here, at #56, on my Google Drive here, on GS here, and on TN here.  I must say that I have neither worried nor lost sleep over that issue, either before or after this opinion. As respects the issue actually decided in Apache, I am agnostic which may be an admission that I have not really dug deeply into the issue. So, I don’t propose here to deal with the merits of the issue decided.

I want to address the methodology in reaching the majority opinion and Judge Buch’s concurring opinion.

Judge Buch’s concurring opinion (Slip Op. 22-23) is very short. If I may summarize a very short opinion:

(i)          the statutory text is inconclusive on the competing interpretations which are equally plausible, phenomenon I describe as statutory ambiguity where a best interpretation cannot be made; and

(ii)        where the statute is ambiguous, courts are “inclined to rely on the traditional canon that construes revenue-raising laws against their drafter.”

The majority determines that the statutory text is not ambiguous but then says (Slip Op. 18-19) that the default rule Judge Buch relies on should carry the day even if the text were ambiguous (calling it a “tiebreaking principle"). As stated, this supposed principle, sometimes stated as a canon or maxim of interpretation, operates like the rule of lenity that construes criminal statutes in favor of a defendant, which is a default rule in cases of ambiguity. See e.g., Ryan D. Doerfler, The "Ambiguity" Fallacy, 88 Geo. Wash. L. Rev. 1110, 1116 (2020) (referring to Chevron and lenity as default rules); Intisar A. Rabb, The Appellate Rule of Lenity: Responding to Abbe R. Gluck & Richard A. Posner, Statutory Interpretation on the Bench: A Survey of Forty-Two Judges on the Federal Courts of Appeals, 131 Harv. L. Rev. 179, 194 N. 77 (2018) (Same re lenity).

That interpretive methodology in ambiguity is a default rule similar to the Chevron default rule prior to Chevron’s demise in Loper Bright. As readers of this blog and observers in general know, Loper Bright overruled Chevron and thus the Chevron default rule does not apply in a state of ambiguity as between two or more interpretations, one of which is an agency interpretation qualifying for Chevron deference (generally notice and comment interpretive regulations).

Tax Court Rejects Various Hail Mary Claim, Including APA Claims, to Get Out of Penalty Free (10/8/25)

In Computer Sciences Corp. v. Commissioner, 165 T.C. ___, No. 8 (2025), TC Case No. 4823-21, here, at entry 305 dated 10/6/25*, GS here**, and TN here, the Court (Judge Lauber) issued yet another § 6751(b), here, written supervisor approval opinion where, as in other cases, the taxpayer seeks to avoid an IRS penalty because of a supposed IRS footfault in the penalty assertion process. In addition to the usual § 6751(b) hail mary claims for a get out of penalty free escape, the taxpayer raises Administrative Procedure Act (“APA”) Claims which, I presume, are the reason the opinion was designated for T.C. reporting (as opposed to T.C. Memo or simply an Order).

For persons wanting a preliminary look at the underlying issues of what the case is all about, go to the docket entries linked above at entry 42 Order dated 7/24/23.

I report here on the APA claims, and will then cover its reference to the § 6751(b) regulations adopted in final in December 2024.

I start my discussion with a quote from Bryan Camp’s iconic post The APA Is Not A Hammer (Procedurally Taxing Blog 6/24/22), here, which opens:

Kristin Hickman loves the APA. To channel Jed Rakoff, it’s her Stradivarius, her Colt 45, her Louisville Slugger, her Cuisinart, and her True Love. It’s her Hammer, her righteous Mjölnir.

And when you have a hammer, everything looks like a nail. Including ALL Treasury regulations.

Although Computer Sciences is not directly attacking regulations, the same comment is appropriate here. With the modern claims about the APA, everything begins to look like a nail, so taxpayers unleash the APA to attack IRS action regardless of how far-fetched the attack is.

In Computer Sciences, I introduce the Court’s holdings from the opening relevant headnotes that, while not technically part of the opinion, for present purposes fairly summarize the opinion (after each holding, I provide brief comment for context):