15 U.S.C. § 4111 : US Code - Section 4111: "Arctic" defined

      As used in this chapter, the term "Arctic" means all United
    States and foreign territory north of the Arctic Circle and all
    United States territory north and west of the boundary formed by
    the Porcupine, Yukon, and Kuskokwim Rivers; all contiguous seas,
    including the Arctic Ocean and the Beaufort, Bering, and Chukchi
    Seas; and the Aleutian chain.