Subject to valid existing rights, all applications made pursuant to the Acts of June 1, 1938 (52 Stat. 609),1 May 3, 1927 (44 Stat. 1364),1 May 14, 1898 (30 Stat. 413),1 and March 3, 1891 (26 Stat. 1097), which were filed with the Department of the Interior within the time provided by applicable law, and which describe land in Alaska that was available for entry under the aforementioned statutes when such entry occurred, are hereby approved on the one hundred and eightieth day following the effective date of this Act, except where provided otherwise by paragraph (3) or (4) of this subsection, or where the land description of the entry must be adjusted pursuant to subsection (b) of this section, in which cases approval pursuant to the terms of this subsection shall be effective at the time the adjustment becomes final.

Where an application describes land within the boundaries of a unit of the National Park System or a unit of the National Wildlife Refuge System, or a unit of the National Wilderness Preservation System in the Tongass or Chugach National Forests established before the effective date of this Act or by this Act, and the described land was not withdrawn pursuant to section 11(a)(1) of the Alaska Native Claims Settlement Act [43 U.S.C. 1610(a)(1)], or where an application describes land which has been patented or deeded to the State of Alaska or which on or before the date of entry was validly selected by, tentatively approved, patented, deeded or confirmed to the State of Alaska pursuant to applicable law and was not withdrawn pursuant to section 11(a)(1)(A) of the Alaska Native Claims Settlement Act [43 U.S.C. 1610(a)(1)(A)

] from those lands made available for selection by section 11(a)(2) of the Act [

Paragraph (1) of this subsection and subsection (c) shall not apply to any application which was knowingly and voluntarily relinquished by the applicant.