1. Short title This Act may be cited as the Fighting Opioid Abuse in Transportation Act . 2. Rail mechanical employee controlled substances and alcohol testing (a) Rail mechanical employees Not later than 2 years after the date of enactment of this Act, the Secretary of Transportation shall publish a final rule in the Federal Register revising the regulations promulgated under section 20140 of title 49, United States Code, to designate a rail mechanical employee as a railroad employee responsible for safety-sensitive functions for purposes of that section. (b) Definition of rail mechanical employee The Secretary shall define the term rail mechanical employee by regulation under subsection (a). (c) Savings clause Nothing in this section may be construed as limiting or otherwise affecting the discretion of the Secretary of Transportation to set different requirements by railroad size or other factors, consistent with applicable law. 3. Rail yardmaster controlled substances and alcohol testing (a) Yardmasters Not later than 2 years after the date of enactment of this Act, the Secretary of Transportation shall publish a final rule in the Federal Register revising the regulations promulgated under section 20140 of title 49, United States Code, to designate a yardmaster as a railroad employee responsible for safety-sensitive functions for purposes of that section. (b) Definition of yardmaster The Secretary shall define the term yardmaster by regulation under subsection (a). (c) Savings clause Nothing in this section may be construed as limiting or otherwise affecting the discretion of the Secretary of Transportation to set different requirements by railroad size or other factors, consistent with applicable law. 4. GAO report on Department of Transportation’s collection and use of drug testing data (a) In general Not later than 18 months after the date of enactment of this Act, the Comptroller General of the United States shall— (1) review the Department of Transportation Drug and Alcohol Testing Management Information