Cite as: 531 U. S. 457 (2001)
Opinion of the Court
A
The Administrator first urges, however, that we vacate the judgment of the Court of Appeals on this issue because it lacked jurisdiction to review the EPA's implementation policy. Section 307(b)(1) of the CAA, 42 U. S. C. § 7607(b)(1), gives the court jurisdiction over "any . . . nationally applicable regulations promulgated, or final action taken, by the Administrator," but the EPA argues that its implementation policy was not agency "action," was not "final" action, and is not ripe for review. We reject each of these three contentions.
At the same time the EPA proposed the revised ozone NAAQS in 1996, it also proposed an "interim implementation policy" for the NAAQS, see 61 Fed. Reg. 65752 (1996), that was to govern until the details of implementation could be put in final form through specific "rulemaking actions." The preamble to this proposed policy declared that "the interim implementation policy . . . represent[s] EPA's preliminary views on these issues and, while it may include various statements that States must take certain actions, these statements are made pursuant to EPA's preliminary interpretations, and thus do not bind the States and public as a matter of law." Ibid. If the EPA had done no more, we perhaps could accept its current claim that its action was not final. However, after the agency had accepted comments on its proposed policy, and on the same day that the final ozone NAAQS was promulgated, the White House published in the Federal Register what it titled a "Memorandum for the Administrator of the Environmental Protection Agency" that prescribed implementation procedures for the EPA to follow. 62 Fed. Reg. 38421 (1997). (For purposes of our analysis we shall assume that this memorandum was not itself action by the EPA.) The EPA supplemented this memorandum with an explanation of the implementation procedures, which it published in the explanatory preamble to its final ozone
477
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