73 Pa. Stat. § 1902
The following words and phrases when used in this act shall have, unless the context clearly indicates otherwise, the meanings given to them in this section:
"Default." The failure timely to perform any obligation or duty set forth in this act or the rental agreement.
"Last known address." That postal address or electronic mailing address provided by the occupant in the latest rental agreement or the postal address or electronic mailing address provided by the occupant in a subsequent written notice of a change of address.
"Leased space." The individual storage space at the service storage facility which is leased or rented to an occupant pursuant to a rental agreement.
"Occupant." A person, his sublessee, successor or assign, entitled to the use of leased space at a self-service storage facility under a rental agreement, to the exclusion of others.
"Owner." The owner, operator, lessor or sublessor of a self-service storage facility, his agent or any person authorized by him to manage the facility or to receive rent from an occupant under a rental agreement or any of his employees. An owner is not a warehouseman as defined in 13 Pa.C.S. § 7102 (relating to definitions and index of definitions). If, however, an owner shall issue any warehouse receipt, bill of lading or other document of title for the personal property stored, the owner and occupant shall be subject to 13 Pa.C.S. Div. 7 (relating to warehouse receipts, bills of lading and other documents of title) and this act shall not apply.
"Personal property." Movable property not affixed to land and includes, but is not limited to, goods, wares, merchandise, furniture and household items.
"Rental agreement." Any written agreement or lease, that establishes or modifies the terms, conditions, rules or other provisions concerning the use and occupancy of a self-service storage facility.
"Self-service storage facility." Any real property designed and used for the purpose of renting or leasing individual storage space to occupants who are to have access to such space for the purpose of storing and removing personal property. No occupant shall use a self-service storage facility for residential purposes.
"Verified mail." Any method of mailing that is offered by the United States Postal Service or private delivery service that provides evidence of mailing.
73 P.S. § 1902