[Code of Federal Regulations] [Title 49, Volume 3] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR199.217] [Page 222] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 199_DRUG AND ALCOHOL TESTING--Table of Contents Subpart C_Alcohol Misuse Prevention Program Sec. 199.217 On-duty use. Each operator shall prohibit a covered employee from using alcohol while performing covered functions. No operator having actual knowledge that a covered employee is using alcohol while performing covered functions shall permit the employee to perform or continue to perform covered functions.