Yesterday, the Supreme Court held oral argument in Garland v. Cargill (No. 22-976 docket here, oral argument audio here, and transcript of oral argument here). The ultimate issue is whether “bump stock” devices are within the definition of “machinegun” in the National Firearms Act of 1934, as amended, and the Gun Control Act of 1968. Bump stocks were not devised when the statute was enacted and there is no definitive interpretation of the statutory term “machinegun” that includes or excludes bump stocks. Hence, the job of the regulator or the court in interpreting or applying the term is to determine whether, within the fair bounds of interpretation, the term includes or excludes bump stocks.
At first glance, this issue might call for the application of Chevron deference. Recall that Chevron deference requires two steps—
- Step One where the Court determines whether, on the text alone using proper tools of statutory interpretation, the text resolves the issue. If the text does, the interpreted text applies and there is no deference. If the text does not resolve the interpretive issue and the text is said to be ambiguous.
- Step Two, reached only if Step One does not resolve the interpretive issue, where the court determines whether the agency interpretation is reasonable (also called permissible). If so, the agency interpretation will prevail. Note that I said “prevail” rather than that the agency interpretation receives deference which is the standard Chevron Step Two formulation. Deference is only meaningful when the agency interpretation is not the best interpretation. If, within the zone of ambiguity in the statutory text, the agency interpretation is the better interpretation or even in equipoise as to the best interpretation, applying the agency interpretation is not deference. See e.g., What is the Best Interpretation for Purposes of Determining a Not Best Interpretation for Chevron Deference? (Federal Tax Procedure Blog 10/21/22; 11/8/22), here.
In the facts of Cargill, the agency interpretation of “machinegun” to include bump stocks was made in the Trump administration in a notice and comment regulation adopting an “interpretive” rule. (I will address the interpretive characterization for the regulation below.) In adopting the regulation, the agency relied on Chevron. In the litigation culminating in Cargill in the Supreme Court, the agency did not rely on Chevron but rather asserted that the interpretation was the best interpretation. (Conceptually, the best interpretation can be determined at Step One or at Step Two (if the agency interpretation is the best in the zone of ambiguity); so it is unclear which Step the government’s reliance on the best interpretation applies.)
At oral argument, apparently because the government was not relying on deference or perhaps the uncertain future of Chevron deference, Chevron or deference was not mentioned. The argument simply addressed whether the text “machinegun” resolved the issue.