California Code, Government Code - GOV § 54780

(a) The indenture or the resolution providing for the issuance of the bonds may pledge or assign the tax revenues to be received. The indenture or resolution providing for the issuance of the bonds may contain provisions for protecting and enforcing the rights and remedies of the bondholders as may be reasonable and proper and not in violation of law, including provisions specifically authorized to be included in any resolution or resolutions of the county authorizing bonds.

(b) Any bank or trust company doing business under the laws of the State of California, which may act as a depository of the proceeds of bonds or of tax revenues or other moneys, shall furnish indemnifying bonds or pledge securities when required by the county.

(c) The indenture may set forth the rights and remedies of the bondholders and of the trustee or trustees, and may restrict the individual right of action of bondholders. In addition, any indenture or resolution may contain other provisions the county determines to be reasonable and proper for the security of the bondholders.