Cal. Sts. & High. Code § 33108

Reference on the face of the bonds to any such resolution by the date of its adoption, or to any such contract or other agreement by the date of its execution, or the apparent date on the face thereof, is sufficient to incorporate all of the provisions of the contract or agreement into the body of the bonds and their appurtenant coupons. Each taker and subsequent holder of the bonds or coupons, whether the coupons are attached to or detached from the bonds, has recourse to all of the provisions of the indenture and is bound thereby.