Ala. Code § 11-50A-31
Any pledge or security interest created or granted by the authority shall be valid and binding from the time when the same is made; moneys or property which are the subject of such pledge or security interest and then held or thereafter received by the authority shall immediately be subject to such pledge or security interest without any physical delivery thereof or further act; and such pledge or security interest 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 or not such parties have notice thereof. Neither the bond resolution, trust agreement or indenture nor any other instrument relating to bonds, bond anticipation notes or notes or otherwise creating or granting any such pledge or security interest need be filed or recorded in any office other than with the records of the authority.
Ala. Code § 11-50A-31 (1975)