(a) Any of the bonds may be additionally secured by a pledge of any revenues or a mortgage of any housing project or other property of the authority.
(b) Any pledge made to secure bonds shall be valid and binding from the time when the pledge is made. The revenues and receipts or property or interests in the property pledged and thereafter received by the authority, a trustee, or custodian shall immediately be subject to the lien of such pledge without any physical delivery thereof or further act, and the lien of any such pledge shall be valid and binding as against all parties having claims of any kind in tort, contract, or otherwise against such authority, trustee, or custodian, irrespective of whether the parties have notice thereof. Neither the resolution nor any other instrument by which a pledge is created need be recorded.