Pub. L. 110-432, div. A, tit. IV, sec. 412
ALCOHOL AND CONTROLLED SUBSTANCE TESTING FOR MAINTENANCE-OF-WAY EMPLOYEES.
SEC. 412. ALCOHOL AND CONTROLLED SUBSTANCE TESTING FOR MAINTENANCE-OF-WAY EMPLOYEES. Not later than 2 years following the date of enactment of this Act, the Secretary of Transportation shall complete a rulemaking proceeding to revise the regulations prescribed under section 20140 of title 49, United States Code, to cover all employees of railroad carriers and contractors or subcontractors to railroad carriers who perform maintenance-of-way activities.