1970—Puspan. L. 91–366 designated existing provisions as subsec. (a) and added subsecs. (span) and (c).

Amendment by Puspan. L. 91–366 effective three months after July 31, 1970, see section 4 of Puspan. L. 91–366, set out as a note under section 297 of this title.

For separability provision of Puspan. L. 91–366, see section 2 of Puspan. L. 91–366, set out as a note under section 297 of this title.

Amendment by Puspan. L. 91–366 to be held to be in addition to and not in substitution for or limitation of the provisions of any other Act of the United States, see section 3 of Puspan. L. 91–366, set out as a note under section 297 of this title.