75 Pa. C.S. § 8511
The following words and phrases when used in this subchapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Authorized entity." A person or an educational institution holding a PDD authorization.
"Municipality." The term does not include a county.
"Operational phase." Phase 1 or phase 2.
"PDD authorization." An authorization issued by the department under section 8515 (relating to application issuance and renewal) permitting the operation of a personal delivery device in accordance with this subchapter.
"PDD operator." An employee of an authorized entity permitted by the authorized entity to remotely control, monitor or otherwise operate a personal delivery device on behalf of the authorized entity as provided under this subchapter. The term does not include an individual who requests a delivery or service provided by the personal delivery device or dispatches the personal delivery device.
"Pedestrian area." A sidewalk, crosswalk, safety zone, pedestrian tunnel, overhead pedestrian crossing or similar area for pedestrians.
"Phase 1." The operation of a personal delivery device through a driving system that allows remote or autonomous operation by an authorized entity where the device is controlled remotely and a PDD operator is within 30 feet of the PDD and within the line of sight of the PDD.
"Phase 2." The operation of a personal delivery device through a driving system that allows remote or autonomous operation by an authorized entity where the device is monitored remotely by a PDD operator and the driving system is capable of being controlled and overridden remotely by the PDD operator.
75 Pa.C.S. § 8511