Sts. & Hy. Code, § 30505

After all bonds issued pursuant to this chapter for the acquisition or construction of any toll bridge or other highway crossing and the transportation facilities thereof or thereto have been fully redeemed and paid, the commission may continue to collect tolls and other revenues for the use of the toll bridge or other highway crossing for the purpose of reimbursing the state for any expenditures which have been made by it in connection with the toll bridge or other highway crossing, and the transportation facilities thereof or thereto, and for the purpose of repayment to any city, county, district, or political subdivision of the state of any amount the commission has agreed to repay for money, rights-of-way, labor, materials, or other property advanced or contributed for the acquisition or construction of the toll bridge or other highway crossing or transportation facilities thereof or thereto.