Nothing in this chapter may be construed to affect the functions or authorities of the Administrator of General Services with respect to the operation, maintenance, and protection of buildings and grounds owned or occupied by the Federal Government and under the jurisdiction, custody, or control of the Administrator. Except for the law enforcement and related security functions transferred under section
of this title, the Administrator shall retain all powers, functions, and authorities vested in the Administrator under chapter 1, except section
, andchapters 5 to 11 of title
and other provisions of law that are necessary for the operation, maintenance, and protection of such buildings and grounds.