[Code of Federal Regulations] [Title 49, Volume 6] [Revised as of October 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR655.53] [Page 67] TITLE 49--TRANSPORTATION TRANSPORTATION PART 655--PREVENTION OF ALCOHOL MISUSE AND PROHIBITED DRUG USE IN TRANSIT OPERATIONS--Table of Contents Subpart F--Drug and Alcohol Testing Procedures Sec. 655.53 Supervisor acting as collection site personnel. An employer shall not permit an employee with direct or immediate supervisory responsibility or authority over another employee to serve as the urine collection person, breath alcohol technician, or saliva- testing technician for a drug or alcohol test of the employee.