Cal. Wat. Code § 13839
All bonds authorized, which have been duly sold and delivered pursuant to this chapter, shall constitute valid and legally binding general obligations of the State of California, and the full faith and credit of the State of California is hereby pledged for the punctual payment of both principal and interest thereon.
There shall be collected annually in the same manner, and at the same time as other state revenue is collected, a sum, in addition to the ordinary revenues of the state, that is required to pay the principal and interest on the bonds, and it is hereby made the duty of all officers charged by law with any duty in regard to the collection of that revenue, to do and perform each and every act which shall be necessary to collect that additional sum.
All money deposited in the fund which has been derived from premium on bonds sold is available for transfer to the General Fund as a credit to expenditures for bond interest.
Ca. Water Code § 13839