(a)
Applicability of subchapter; delegation of authority
Executive agencies shall make purchases and contracts for property and services in accordance with the provisions of this subchapter and implementing regulations of the Administrator; but this subchapter does not apply—
(1)
to the Department of Defense, the Coast Guard, and the National Aeronautics and Space Administration; or
(2)
when this subchapter is made inapplicable pursuant to section
113
(e) of title
40 or any other law, but when this subchapter is made inapplicable by any such provision of law, sections
5 and
8 of this title shall be applicable in the absence of authority conferred by statute to procure without advertising or without regard to said section
5 of this title.