Cal. Government Code § 64109

(a) To the extent permitted by law, in connection with any project financed or refinanced pursuant to this division, the project sponsor may pledge the following revenue sources as security for revenue bonds issued under this division: (1) Local transportation funds, including, but not limited to, fuel taxes, Article XIX B fuel sales taxes, local transportation sales taxes, other state revenues approved for this purpose by the Legislature or by initiative, and developer fees. To the extent that these revenue sources are within the control of a local agency, the revenue sources may only be pledged with approval of the governing board of the local agency. To the extent that these revenues are within the control of a state agency, the revenue sources may only be pledged with approval by the department and the commission. (2) Tolls, on facilities where not otherwise prohibited by statute, collected by a project sponsor with the approval of the authority. (b) Where the authority is issuing bonds to finance or refinance a project, the authority shall accept a project sponsor’s pledge made pursuant to subdivision (a) and pledge those revenues to the repayment of bonds issued to finance or refinance the applicable project.