2017—Subsec. (a). Pub. L. 115–91 inserted “or 335(b)” after “section 302(b)”.

1992—Subsec. (d). Pub. L. 102–573, § 901(1), struck out subsec. (d) which required a report to Congress by the Secretary no later than 6 months after Nov. 23, 1988, relating to overtime pay for individuals employed by the Service.

Subsec. (e). Pub. L. 102–573, § 117(b)(8), struck out subsec. (e) which authorized appropriations for fiscal years 1990 to 1992.