49 C.F.R. § 655.32 On duty use.
Title 49 - Transportation
Each employer shall prohibit a covered employee from using alcohol while performing safety-sensitive functions. No employer having actual knowledge that a covered employee is using alcohol while performing safety-sensitive functions shall permit the employee to perform or continue to perform safety-sensitive functions.
Title 49: Transportation
PART 655—PREVENTION OF ALCOHOL MISUSE AND PROHIBITED DRUG USE IN TRANSIT OPERATIONS
Subpart D—Prohibited Alcohol Use
§ 655.32 On duty use.

