Amounts appropriated to construct public buildings remain available until completion of the work. When a building is completed and outstanding liabilities for the construction are paid, balances remaining shall revert immediately to the Treasury.

(Pub. L. 97–258, Sept. 13, 1982, 96 Stat. 918.)

The words before the proviso in the Act of June 23, 1874 (ch. 476, 18 Stat. 275), are omitted as obsolete.