HSC § 55105

Any pledge made by the local agency shall be valid and binding from the time when the pledge is made. The revenues, moneys, or property so pledged and thereafter received by the local agency shall immediately be subject to the lien of the pledge without any physical delivery thereof or further act, and the lien of the pledge shall be valid and binding as against all parties having claims of any kind in tort, contract, or otherwise against the local agency, irrespective of whether the parties have notice thereof. Neither the resolution nor any other instrument by which a pledge is created need be recorded.