; and (B) would have all exterior boundaries 50 miles or more from the closest exterior boundary of another national monument declaration under this section. (2) Other requirement A monument described in this subsection shall be subject to the preparation of an environmental assessment or environmental impact statement as part of a review under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.). The choice of environmental review document shall be within the discretion of the Secretary of the Interior or the Secretary of Agriculture, as appropriate. (h) Exception for monuments 10,000 acres and up to 85,000 acres Subsection (e) shall not apply to the designation of a national monument under this section if the national monument so designated— (1) would be at least 10,000 acres but not more than 85,000 acres; (2) would have all exterior boundaries 50 miles or more from the closest exterior boundary of another national monument declaration under this section; and (3) has been approved by the elected governing body of each county (or county equivalent), the legislature of each State, and the Governor of each State within whose boundaries the national monument will be located (and the Governor of each such State has transmitted a copy of each such approval to the President). (i) Exception for emergency designation (1) In general Subsection (e) shall not apply to the designation under this section of a national monument of any acreage amount if designation is made to prevent imminent and irreparable harm to the object or objects of antiquity to be protected by the designation. (2) One year limitation A national monument designation under this subsection shall terminate on the date that is one calendar year after the date of the designation. (3) One time designation Land designated as a national monument under this subsection— (A) may only be so designated one time