The Koyukuk Controlled Use Area: the area consists of those portions of Unit 21 and 24 bounded by a line from the north bank of the Yukon River at Koyukuk at 64° 52.58' N. lat., 157° 43.10' W. long., then northerly to the confluence of the Honhosa and Kateel Rivers at 65° 28.42' N. lat., 157° 44.89' W. long., then northeasterly to the confluence of Billy Hawk Creek and the Huslia River at 65° 56.66' N. lat., 156° 40.81' W. long., then easterly to the confluence of the lower forks of the Dakli River at 66° 02.56' N. lat., 156° 12.71' W. long.,, then easterly to the confluence of McLanes Creek and the Hogatza River at 66° 00.31' N. lat., 155° 18.57' W. long., then easterly to the middle of the Hughes airstrip at 66° 02.56' N. lat., 154° 15.69' W. long., then south to Little Indian River at 65° 47.10' N. lat., 154° 15.69' W. long., then southwesterly to the crest of Hochandochtla Mountain at 65° 31.87' N. lat., 154° 52.18' W. long., then southwest to the mouth of Cottonwood Creek at 65° 13.00'N. lat., 156° 06.43' W. long., then southwest to Bishop Rock (Yistletaw) at 64° 49.35' N. lat., 157° 21.73' W. long., then westerly along the north bank of the Yukon River (including Koyukuk Island) to the point of beginning The area is closed to the use of aircraft for hunting moose, including the transportation of moose hunters, their hunting gear, or parts of moose; however, this provision does not apply to the transportation of moose hunters, their hunting gear, or parts of moose by aircraft between publicly owned airports, or the transportation into the area of game meat that has been processed for human consumption. All hunters on the Koyukuk River passing the department's check station at Ella's Cabin (15 miles upstream from the Yukon on the Koyukuk River) are required to stop at the check station and report to department personnel. The meat of the hindquarters, forequarters, and ribs of any moose taken in the area must remain on the bone until the moose has been transported out of the area.