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2 questions doctrine that way. Rather, I understand it to emphasize the importance of context when a court interprets a delegation to an administrative agency. Seen in this light, the major questions doctrine is a tool for discerning—not departing from—the text’s most natural interpretation.

Substantive canons are rules of construction that advance values external to a statute. A. Barrett, Substantive Canons and Faithful Agency, 90 B. U. L. Rev. 109, 117 (2010) (Barrett). Some substantive canons, like the rule of lenity, play the modest role of breaking a tie between equally plausible interpretations of a statute. United States v. Santos, 553 U. S. 507, 514 (2008) (plurality opinion). Others are more aggressive—think of them as strong-form substantive canons. Unlike a tie-breaking rule, a strong-form canon counsels a court to strain statutory text to advance a particular value. Barrett 168. There are many such canons on the books, including constitutional avoidance, the clear-statement federalism rules, and the presumption against retroactivity. Id., at 138–145, 172–173. Such rules effectively impose a “clarity tax” on Congress by demanding that it speak unequivocally if it wants to accomplish certain ends. J. Manning, Clear Statement Rules and the Constitution, 110 Colum. L. Rev. 399, 403 (2010). This “clear statement” requirement means that the better interpretation of a statute will not necessarily prevail. E.g., Boechler v. Commissioner, 596 U. S. ___, ___ (2022) (slip op., at 6) (“[I]n this context, better is not enough”). Instead, if