The Department of Agriculture is authorized to erect, alter, and repair such buildings and other public improvements as may be necessary to carry out its authorized work: Provided, That no building or improvement shall be erected or altered under this authority unless provision is made therefor in the applicable appropriation and the cost thereof is not in excess of limitations prescribed therein.
(Sept. 21, 1944, ch. 412, title VII, § 703, 58 Stat. 742.)