66 Pa. C.S. § 3101
Each foreign trade zone established and maintained within the limits of this Commonwealth as set forth in this chapter shall be operated as a public utility, and all rates and charges for all services or privileges within the zone shall be fair and reasonable, but no such rates or charges shall be subject to supervision, regulation or control by the commission. Every municipality and private corporation operating and maintaining a foreign trade zone shall afford to all who may apply for the use of the trade zone and its facilities and appurtenances, uniform treatment under like conditions, subject to such treaties or commercial conventions as are now in force or may hereafter be made from time to time by the United States with foreign governments.
66 Pa.C.S. § 3101