[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR391.45] [Page 1115] TITLE 49--TRANSPORTATION DEPARTMENT OF TRANSPORTATION PART 391_QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS--Table of Contents Subpart E_Physical Qualifications and Examinations Sec. 391.45 Persons who must be medically examined and certified. Except as provided in Sec. 391.67, the following persons must be medically examined and certified in accordance with Sec. 391.43 as physically qualified to operate a commercial motor vehicle: (a) Any person who has not been medically examined and certified as physically qualified to operate a commercial motor vehicle; (b)(1) Any driver who has not been medically examined and certified as qualified to operate a commercial motor vehicle during the preceding 24 months; or (2) Any driver authorized to operate a commercial motor vehicle only with an exempt intracity zone pursuant to Sec. 391.62, or only by operation of the exemption in Sec. 391.64, if such driver has not been medically examined and certified as qualified to drive in such zone during the preceding 12 months; and (c) Any driver whose ability to perform his/her normal duties has been impaired by a physical or mental injury or disease. [35 FR 6460, Apr. 22, 1970, as amended at 36 FR 223, Jan. 7, 1971; 54 FR 12202, Mar. 24, 1989; 61 FR 13347, Mar. 26, 1996]