WASHINGTON (Reuters) – U.S. Supreme Court justices on Monday for a second time wrestled with an Alaska moose hunter’s claim that the federal government overstepped its authority in banning hovercraft on National Park Service land in the northernmost U.S. state.

Hunter John Sturgeon has challenged the U.S. government’s power to prevent him from riding his hovercraft on a river through a federal preserve to reach remote moose-hunting grounds. The case, concerning exemptions given to some Alaska-based waterways from nationwide U.S. regulations, could have bigger implications in other matters, including oil and gas extraction.

During arguments in the case, some of the nine justices questioned the scope of authority that the National Park Service seeks to exercise in Alaska.

Chief Justice John Roberts seemed…