52 Pa. Code § 29.1
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Common carrier-A common carrier by motor vehicle, as defined in 66 Pa.C.S. § 102 (relating to definitions), transporting passengers.
Contract carrier-A contract carrier by motor vehicle, as defined in 66 Pa.C.S. § 2501 (relating to declaration of policy and definitions), transporting passengers.
Exclusive service-Transportation on a given trip when the first or principal person, party or group hiring the vehicle has the exclusive right to determine where, when or if another passenger shall be carried on that trip.
Nonexclusive service-Transportation on a given trip where passengers other than the first or principal person, party or group hiring the vehicle may be carried as permitted by the applicable tariff provisions of the carrier and the rules and regulations governing the class of service under which the vehicle is operating.
52 Pa. Code § 29.1