67 Pa. Code § 257.2
The following words and terms, when used in this chapter, have the following meanings unless the context clearly indicates otherwise:
Electric mass transit vehicle-An electrically propelled device designed and used for the transportation of 15 or more passengers for compensation, including subway cars, trolleys, and trackless trolleys.
Inspection-An inspection performed under the supervision of an inspector. Routine preventative and other maintenance procedures, by themselves, shall not constitute an inspection.
Inspector-A person designated by a mass transit operator to conduct an inspection.
Mass transit operator-A company, authority or any other transportation entity responsible for the operation and maintenance of electric mass transit vehicles.
Official inspection-A semiannual inspection performed under applicable provisions of law and Department regulations. An official inspection must include inspection of all safety items identified in this chapter.
Vehicle-An electric mass transit vehicle.
67 Pa. Code § 257.2