52 Pa. Code § 29.352
In order to advance and promote the public necessity, safety and convenience, the Commission may, upon application, grant a new certificate or an amendment to an existing certificate in order to allow to be provided a new, innovative or experimental type or class of common carrier service. An application for a certificate or amendment shall state that it is an application for an experimental service. Holders of experimental certificates shall abide by this chapter except those which the Commission shall explicitly state do not apply. Holders of experimental certificates shall abide by an additional regulations or requirements, including informational and reporting requirements, which the Commission shall stipulate upon granting the certificate. A certificate for experimental service shall be valid only until the service is abandoned, until 2 years have elapsed from the time the certificate was approved or until the Commission enacts amendments to this chapter pertaining to the new class of service represented by the experimental service, whichever event occurs first.
52 Pa. Code § 29.352
This section cited in 52 Pa. Code § 29.351 (relating to conditions).