36 C.F.R. § 1150.2
(a) Definitions. As used in this section, the term:
Constructed or altered on behalf of the United States means acquired by the United States through lease-purchase arrangement, constructed or altered for purchase by the United States, or constructed or altered for the use of the United States.
Primarily for use by able-bodied military personnel means expected to be occupied, used, or visited principally by military service personnel. Examples of buildings so intended are barracks, officers' quarters, and closed messes.
Privately owned residential structure means a single or multi-family dwelling not owned by a unit or subunit of Federal, state, or local government.
(b) Buildings and facilities covered. Except as provided in paragraph (c) of this section, the standards issued under the Architectural Barriers Act of 1968, Pub. L. 90-480, as amended, 42 U.S.C. 4151 et seq. (including standards of the United States Postal Service) apply to any building or facility—
(1) The intended use for which either—
(2) Which is—
(ii) To be leased in whole or in part by the United States—
(c) Buildings and facilities not covered. The standards do not apply to—