16
Opinion of the Court
v. Natural Resources Defense Council, Inc., 467 U. S. 837, 842-843 (1984)]." Id., at 694-695.
Because of the importance of the proceeding, we granted both the petition of the State of New York et al. (collectively New York) questioning FERC's assertion of jurisdiction over unbundled retail transmissions and the petition of Enron Power Marketing, Inc. (Enron), questioning FERC's refusal to assert jurisdiction over bundled retail transmissions. 531 U. S. 1189 (2001). We address these two questions separately. At the outset, however, we note that no petitioner questions the validity of the order insofar as it applies to wholesale transactions: The parties dispute only the proper scope of FERC's jurisdiction over retail transmissions. Furthermore, we are not confronted with any factual issues. Finally, we agree with FERC that transmissions on the interconnected national grids constitute transmissions in interstate commerce. See, e. g., FPC v. Florida Power & Light Co., 404 U. S. 453, 466-467 (1972); n. 5, supra.
III
The first question is whether FERC exceeded its jurisdiction by including unbundled retail transmissions within the scope of its open access requirements in Order No. 888. New York argues that FERC overstepped in this regard, and that such transmissions—because they are part of retail transactions—are properly the subject of state regulation. New York insists that the jurisdictional line between the States and FERC falls between the wholesale and retail markets.
As the Court of Appeals explained, however, the landscape of the electric industry has changed since the enactment of the FPA, when the electricity universe was "neatly divided into spheres of retail versus wholesale sales." 225 F. 3d, at 691. As the Court of Appeals also explained, the plain language of the FPA readily supports FERC's claim of jurisdiction. Section 201(b) of the FPA states that FERC's
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