(a)
Notwithstanding any other provision of law, no action may be taken to effect or implement—
(1)
the closure of any military installation at which at least 300 civilian personnel are authorized to be employed;
(2)
any realignment with respect to any military installation referred to in paragraph (1) involving a reduction by more than 1,000, or by more than 50 percent, in the number of civilian personnel authorized to be employed at such military installation at the time the Secretary of Defense or the Secretary of the military department concerned notifies the Congress under subsection (b) of the Secretary’s plan to close or realign such installation; or
(3)
any construction, conversion, or rehabilitation at any military facility other than a military installation referred to in clause (1) or (2) which will or may be required as a result of the relocation of civilian personnel to such facility by reason of any closure or realignment to which clause (1) or (2) applies,
unless and until the provisions of subsection (b) are complied with.