Cal. Government Code § 53515

(a) General obligation bonds issued and sold by or on behalf of a local agency shall be secured by a statutory lien on all revenues received pursuant to the levy and collection of the tax. The lien shall automatically arise without the need for any action or authorization by the local agency or its governing body. The lien shall be valid and binding from the time the bonds are executed and delivered. The revenues received pursuant to the levy and collection of the tax shall be immediately subject to the lien, and the lien shall immediately attach to the revenues and be effective, binding, and enforceable against the local agency, its successors, transferees, and creditors, and all others asserting rights therein, irrespective of whether those parties have notice of the lien and without the need for any physical delivery, recordation, filing, or further act. (b) This section is not intended to supplement or limit a local agency’s power to issue general obligation bonds conferred by any other law. (c) For purposes of this section, both of the following definitions apply: (1) “General obligation bonds” means bonds, warrants, notes, or other evidence of indebtedness of a local agency payable, both principal and interest, from the proceeds of ad valorem taxes that may be levied pursuant to paragraphs (2) and (3) of subdivision (b) of Section 1 of Article XIII A of the California Constitution. (2) “Local agency” means any city, county, city and county, school district, community college district, authority, or special district.