The date of enactment of the Rail Safety Improvement Act of 2008, referred to in subsec. (a), is the date of enactment of div. A of Pub. L. 110–432, which was approved Oct. 16, 2008.

2008—Pub. L. 110–432 amended section generally, revising and restating provisions of former subsec. (a) relating to waivers as subsecs. (a) to (c), provisions of former subsec. (b) relating to requirement of a report to Congress as subsec. (d), and provisions of former subsec. (c) defining “directly affected covered service employees” as subsec. (e).