Opinion of the Court
other) waters “located within [a park’s] boundaries,” without any “regard to… ownership.” 36 CFR §§2.17(e), 1.2(a)(3); see supra, at 2. That regulation, issued under the Secretary’s Organic Act authority, applies on its face to parks across the country. See supra, at 8 (describing Organic Act). And Sturgeon did not doubt that the Nation River is a navigable water. But Sturgeon protested that in Alaska (even though nowhere else) the rule could not be enforced on a waterway—like, he said, the Nation River—that is not owned by the Federal Government. And when his objection got nowhere with the rangers (or with the Secretary, to whom he later petitioned), Sturgeon stopped using his hovercraft—but also brought this lawsuit, based on ANILCA’s Section 103(c).
In Sturgeon I., we rejected one ground for dismissing Sturgeon’s case, but remanded for consideration of two further questions. The District Court and Court of Appeals for the Ninth Circuit had held that even assuming the Nation River is non-public land, the Park Service could enforce its hovercraft ban there. See 2013 WL 5888230 (Oct. 30, 2013); 768 F. 3d 1066 (2014). Those two courts interpreted Section 103(c) to limit only the Service’s authority to impose Alaska-specific regulations on such lands—not its authority to apply nationwide regulations like the hovercraft rule. But we viewed that construction as “implausible.” 577 U. S., at ___ (slip op., at 15). ANILCA, we reasoned, “repeatedly recognizes that Alaska is different.” Id., at ___ (slip op., at 13); see id., at ___ (slip op., at 14) (The Act “reflect[s] the simple truth that Alaska is often the exception, not the rule”). Yet the lower courts’ reading would “prevent the Park Service from recognizing Alaska’s unique conditions”—thus producing a “topsy-turvy” result. Ibid. Still, we thought two hurdles remained before Sturgeon could take his hovercraft out of storage. We asked the Court of Appeals to decide whether the Nation River “qualifies as ‘public land’ for purposes of
