California Code, Government Code - GOV § 64124

A pledge by or to the issuer of revenues, moneys, accounts, accounts receivable, contract rights, and other rights to payment of whatever kind made by or to the issuer pursuant to the authority granted in this division shall be valid and binding from the time the pledge is made for the benefit of pledges and successors thereto. The revenues, moneys, accounts, accounts receivable, contract rights, and other rights to payment of whatever kind pledged by or to the issuer or its assignees shall immediately be subject to the lien of the pledge without physical delivery or further act. The lien of the pledge shall be valid and binding against all parties, irrespective of whether the parties have notice of the claim. The indenture, trust agreement, resolution, or another instrument by which the pledge is created need not be recorded.