Notwithstanding any other provision of law or regulation, whenever the Secretary receives an application for an oil and gas lease pursuant to the Mineral Leasing Act of 1920 [
30 U.S.C.
181 et seq.] for lands in Alaska within a unit of the National Wildlife Refuge System which are not also part of the national Wilderness Preservation System he shall, in addition to any other requirements of applicable law, follow the procedures set forth in this section.