California Code, Civil Code - CIV § 2214

(a) “Carrier of passengers” means a motor carrier, passenger carrier, or charter-party carrier of passengers that operates a motor vehicle, on a commercial or for-hire basis, and engages in the embarkation and disembarkation of passengers.

(b) “Charter-party carrier of passengers” has the same meaning as used in Section 5360.

(c) “Disembarkation” means the physical discharge of passengers from a transportation service provided by a carrier of passengers at a geographic location within California.

(d) “Embarkation” means the physical commencement of a transportation service provided by a carrier of passengers.

(e) “Motor vehicle” has the same meaning as used in Section 5359 of the Public Utilities Code.