120.21—Testing for alcohol.
(a)
Each air traffic control facility not operated by the FAA or the U.S. military must establish an alcohol testing program in accordance with the provisions of subpart F of this part.
(b)
No employer shall use any individual who meets the definition of covered employee in subpart A of this part to perform a safety-sensitive function listed in subpart F of this part unless that individual is subject to testing for alcohol misuse in accordance with the provisions of that subpart.