CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER III—FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 300–399) > SUBCHAPTER B—FEDERAL MOTOR CARRIER SAFETY REGULATIONS (Parts 350–399) > PART 383—COMMERCIAL DRIVER'S LICENSE STANDARDS; REQUIREMENTS AND PENALTIES > SUBPART D—Driver Disqualifications and Penalties (§383.51 to §383.53)