Cal. Sts. & High. Code § 31156

All benefits conferred or obligations imposed by this chapter or by any other law with respect to making provision for the payment, whether from tolls or other revenues received from the use and operation of the toll tunnel or from other sources, of expenses in connection with the operation, maintenance, and insurance of, and the construction of approaches to, the toll tunnel, shall, notwithstanding the retirement or discharge of any or all of the bonds issued by the authority for the purpose of constructing the toll tunnel, inure to and continue for the benefit of any other bonds issued pursuant to this chapter as additional to, or funding, or refunding the bonds originally issued.