A prior section 504 of Pub. L. 93–344, title V, July 12, 1974, 88 Stat. 322, was classified to section 1020a of former Title 31, prior to repeal by Pub. L. 97–258, § 5(b), Sept. 13, 1982, 96 Stat. 1068.

1997—Subsec. (b)(1). Pub. L. 105–33, § 10117(b)(1), amended par. (1) generally. Prior to amendment, par. (1) read as follows: “appropriations of budget authority to cover their costs are made in advance;”.

Subsec. (b)(2). Pub. L. 105–33, § 10117(b)(2), substituted “has been provided in advance in an appropriations Act” for “is enacted”.

Subsec. (c). Pub. L. 105–33, § 10117(b)(3), substituted “Subsections (b) and (e)” for “Subsection (b)”.

Subsec. (d)(1). Pub. L. 105–33, § 10117(b)(4), substituted “modify outstanding direct loans (or direct loan obligations) or loan guarantees (or loan guarantee commitments)” for “directly or indirectly alter the costs of outstanding direct loans and loan guarantees”.

Subsec. (e). Pub. L. 105–33, § 10117(b)(5), amended heading and text of subsec. (e) generally. Prior to amendment, text read as follows: “A direct loan obligation or loan guarantee commitment shall not be modified in a manner that increases its cost unless budget authority for the additional cost is appropriated, or is available out of existing appropriations or from other budgetary resources.”