California Code, Public Utilities Code - PUC § 103358

(a) The bonds may be issued by the district at any time, and from time to time, payable from the proceeds of the tax.  The bonds shall be referred to as “limited tax bonds.”  The bonds may be secured by a pledge of revenues from the proceeds of the retail transactions and use tax or any other funds or assets of the district as may be specified by the district.

(b) The pledge of retail transactions and use taxes to the limited tax bonds authorized under this article shall have priority over the use of any of the taxes for “pay-as-you-go” financing, except to the extent that the priority is expressly restricted in the resolution authorizing the issuance of the bonds.

(c) A pledge by or to the district of tax receipts, revenues, moneys, accounts, accounts receivable, contract rights, and other rights to payment of whatever kind made by or to the district shall be valid and binding from the time the pledge is made for the benefit of pledgees and successors thereto.  The tax receipts, revenues, moneys, accounts, accounts receivable, contract rights, and other rights to payment of whatever kind pledged by or to the district or the 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, regardless 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.