(i) Except as provided in paragraph (c)(ii) of this section, annual military construction appropriations acts prohibit the use of cost-plus-fixed-fee contracts that-
(A) Are funded by a military construction appropriations act;
(B) Are estimated to exceed $25,000; and
(C) Will be performed within the United States, except Alaska.
(ii) The prohibition in paragraph (c)(i) of this section does not apply-
(A) To contracts for environmental restoration at an installation that is being closed or realigned where payments are made from a Base Realignment and Closure Account; or
(B) To contracts specifically approved in writing, setting forth the reasons therefor, in accordance with the following:
(1) The Secretaries of the military departments are authorized to approve such contracts that are for environmental work only, provided the environmental work is not classified as construction, as defined by 10 U.S.C. 2801.
(2) The Secretary of Defense or designee must approve such contracts that are not for environmental work only or are for environmental work classified as construction.