Cal. Gov. Code § 6555

In the indenture authorizing the issuance of said bonds the governing body may also fix additional terms and conditions and may in any article, section or clause thereof make such provision or covenant as it may deem necessary or desirable to facilitate the issuance and sale of the bonds or for the protection or security of the holders thereof, including, without affecting the generality of the foregoing, provision for any or all of the matters stated in Sections 6556 to 6568 of this article.