(b) Motor carrier and carrier — A person authorized to engage in the transportation of passengers or property, as a common or contract carrier, in interstate or foreign commerce, under the provisions of 49 U.S.C. 13902.
(c) Motor vehicle — A self–propelled or motor driven vehicle operated by a motor carrier in interstate or foreign commerce under authority issued by the Secretary.
(d) Principal place of business — A single location that serves as a motor carrier’s headquarters and where it maintains or can make available its operational records.
[58 FR 28933, May 18, 1993. Redesignated at 61 FR 54707, Oct. 21, 1996, as amended at 62 FR 15420, Apr. 1, 1997]