53 Pa. Stat. § 16808
The select and common councils of the city of Philadelphia, and the commissioners of the incorporated districts in the county of Philadelphia, shall severally have authority (by ordinance or ordinances) to provide for the proper regulation of omnibuses or vehicles in the nature thereof; and to this end it shall be lawful for the said councils and commissioners as aforesaid to pass ordinances, from time to time, to provide for the issuing of licenses to such and so many persons as may apply to keep and use omnibuses or vehicles in the nature thereof, and to charge a reasonable annual or other sum therefor; and to provide for the punishment of the owners and drivers of the same, by fine, for any violation of the provisions of the ordinances to be enacted by virtue hereof.
53 P.S. § 16808