In United States v. Yoon (N.D. Cal. No.26-cv-01423-VC Order dtd 9/17/26 at # 34), CL here and GS here [to come], the Court enforced an IRS summons issued in response to a request by a treaty partner, South Korea. The significant issues addressed are:
1. The Government need only satisfy the four-part Powell test. United States v. Powell, 379 U.S. 48, 57–58 (1964). (Slip Op. 3.)
2 In applying Powell, only the IRS’s good faith is in issue, not the treaty partner’s good faith. Id.
3 Relevance of the summons to a legitimate tax investigation of the treaty partner is not in issue. (Slip Op. 4-5.) South Korea’s request to the IRS “said that all that information was relevant, and it only sought records from the years that match its investigation;” the “request seems sensible on its face.” There is no requirement that the IRS go behind the treaty partner’s statement of relevance.
4. The Court rejected Yoon’s argument that § 7602(c) requires 45-day notice which was not given here. (Slip Op. 5-7.) The notice period, although stated without limitation in the statutory text, is properly read in context not to apply to a summons issued at a treaty partner’s request. The Court concluded (Slip Op. 7) that “there is no ambiguity” as to that reading of the statute.
5. With regard to this interpretation of the statute, the Court acknowledged the IRS’s long-time consistent interpretation to that effect in Regulation § 301.7602-2(c)(3)(C), noting that the interpretation might in a state of ambiguity be useful in statutory interpretation (absent here), this consideration (Slip Op. 7-8):
For what it’s worth, another consideration works against Yoon here: the IRS’s own longstanding interpretation that section 7602(c) does not apply to foreign tax liabilities. 66 Fed. Reg. 77 (Jan. 2, 2001) (codified at 26 C.F.R. § 301.7602-2(c)(3)(C)). After considering the ordinary meaning of statutory language, a court may look to the interpretation of the agency responsible for implementing the statute. Leon-Vriviesca, 179 F.4th at 1191. Such agency interpretations receive “‘due respect,’ but not binding deference.” Lopez v. Garland, 116 F.4th 1032, 1039 (9th Cir. 2024) (quoting Loper Bright Enterprises v. Raimondo, 603 U.S. 369, 403 (2024)). The IRS’s regulation was issued in 2001, just a few years after the codification of section 7602(c) in 1998, and has remained consistent since then. Therefore, even if the statutory text were ambiguous, the IRS’s interpretation would be “especially useful in determining the statute’s meaning”—and that might cut against Yoon’s legislative purpose argument. Loper Bright, 603 U.S. at 394 (citing Skidmore v. Swift & Co., 323 U.S. 134, 140 (1944)).n5
n5 The government makes an alternative argument that the general grant of rulemaking authority to the IRS in 26 U.S.C. § 7805(a) empowers the agency to “fill up details” in the statutory scheme; i.e., that section 7805(a) explicitly authorizes the agency to define the phrase “tax liability” in section 7602(c). But the best reading of the statutory text, informed by due respect to the IRS’s regulation, is that section 7602(c) does not apply to foreign tax liabilities. It is therefore not necessary to consider whether section 7805(a) can bear the weight that the government says it does.
JAT Comment: