35 Pa. Stat. § 751.9
A pledge of revenues, receipts, moneys, funds or other property or instruments made by the authority shall be valid and binding from the time when the pledge is made. The revenues, receipts, moneys, funds or other property pledged and thereafter received by the authority shall be immediately subject to the lien of the pledge without its physical delivery or further act, and the lien of any pledge shall be valid and binding as against all parties having claims of any kind in tort, contract or otherwise against the authority irrespective of whether the parties have notice of the lien. Neither the resolution nor any other instrument by which a pledge under this section is created or evidenced need be filed or recorded except in the records of the authority.
35 P.S. § 751.9