As used in the part—
(1) The term “Federal agency” means—
an Executive agency as defined in section 105 of title 5; and
each entity specified in subparagraphs (B) through (I) of subsection (1) of section 5721 of title 5.
The term “Federal building” means any building or other structure owned in whole or part by the United States or any Federal agency, including any such structure occupied by a Federal agency under a lease-acquisition agreement under which the United States or a Federal agency will receive fee simple title under the terms of such agreement without further negotiation.