72 Pa. Stat. § 8601-A
The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
"Peer-to-peer car-sharing program." As defined under section 201(qqq).
"Rental vehicle." A private passenger motor vehicle designed to transport fifteen or fewer passengers or a truck, trailer or semitrailer used in the transportation of property other than commercial freight, that is rented without a driver and is part of a fleet of five or more rental vehicles used for that purpose, owned or leased by the same person or entity.
"Shared vehicle." A vehicle that is available for sharing through a peer-to-peer car-sharing program. The term does not include a rental vehicle as defined under this article.
"Vehicle rental company." Any business entity engaged in the business of renting motor vehicles in this Commonwealth.
72 P.S. § 8601-A