N.C. Gen. Stat. § 122D-11
Any pledge made by the Authority shall be valid and binding from time to time when the pledge is made. The money, assets or revenues of the Authority so pledged and thereafter received by the Authority shall immediately be subject to the lien of such pledge without any physical delivery thereof 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 such parties have notice thereof. Neither the resolution nor any other instrument by which a pledge is created need be recorded or filed in order to establish and perfect a lien or security interest in the property so pledged by the Authority. Nothing herein shall be construed to prohibit the Authority from selling any assets subject to any such pledge except to the extent that any such sale may be restricted by the trust agreement or resolution providing for the issuance of such obligations.
N.C. Gen. Stat. § 122D-11