1967—Subsec. (a). Pub. L. 90–190 substituted provisions prohibiting making of appropriations to carry out provisions and purposes of this chapter unless previously authorized by legislation enacted by Congress for provisions granting authority to appropriate such sums as may be necessary and appropriate to carry out provisions and purposes of this chapter.

1962—Subsec. (b). Pub. L. 87–719 authorized an appropriation of $8,719,000 at Los Alamos and use of appropriations for utilities.

1956—Subsec. (b). Act July 25, 1956, § 6, substituted “$2,215,000” for “$2,165,000”.

Subsec. (c). Act July 25, 1956, § 5, repealed subsec. (c) which appropriated funds derived from disposal of property to pay any costs, losses, expenses, or obligations incurred by Commission. See section 2311(b) of this title.