Defense Base Closure and Realignment Act of 1990 ( 10 U.S.C. 2687 note), $322,390,000, to remain available until expended. Family housing construction, army For expenses of family housing for the Army for construction, including acquisition, replacement, addition, expansion, extension, and alteration, as authorized by law, $330,660,000, to remain available until September 30, 2023: Provided , That none of the funds provided under this heading for family housing construction may be expended for family housing improvements on Kwajalein Atoll until the Secretary of the Army certifies to the congressional defense committees that the new housing units represent the best value to the taxpayer and that no reasonable alternatives exist at a lower cost. Family housing operation and maintenance, army For expenses of family housing for the Army for operation and maintenance, including debt payment, leasing, minor construction, principal and interest charges, and insurance premiums, as authorized by law, $376,509,000. Family housing construction, navy and marine corps For expenses of family housing for the Navy and Marine Corps for construction, including acquisition, replacement, addition, expansion, extension, and alteration, as authorized by law, $104,581,000, to remain available until September 30, 2023. Family housing operation and maintenance, navy and marine corps For expenses of family housing for the Navy and Marine Corps for operation and maintenance, including debt payment, leasing, minor construction, principal and interest charges, and insurance premiums, as authorized by law, $314,536,000. Family housing construction, air force For expenses of family housing for the Air Force for construction, including acquisition, replacement, addition, expansion, extension, and alteration, as authorized by law, $78,446,000, to remain available until September 30, 2023. Family housing operation and maintenance, air force For expenses of family housing for the Air Force for operation and maintenance, including debt payment,