California Code, Streets and Highways Code - SHC § 31155

(a) Providing for the amount, form, maturities, registration, and transfer and interchange of the bonds and coupons and the terms and conditions upon which they shall be issued, sold, paid, retired, funded, and refunded.

(b) Providing for a sinking fund for the bonds and designating a trustee or trustees, which shall be a bank or trust company or banks or trust companies duly qualified to do business in this state, to receive and disburse the revenues of the toll bridge works or improvement.

(c) Providing that as long as any of such bonds are outstanding there shall be raised in each year by tolls not less than the minimum amounts required for interest, sinking fund, redemption, and reserve requirements for the bonds, in addition to the amount needed for current operating and maintenance expenses, including insurance costs, required to be paid from such sources.

(d) Such other provisions for the protection of the holders of the bonds as the authority approves including, without limiting (a), (b), or (c), provisions that in the event of refusal or failure to comply with any provision of this chapter or any other applicable law, or of any agreement made with the holders of the bonds or of any issue thereof, the holders of a stated percentage in aggregate principal amount of the bonds, or of such issue thereof as the case may be, then outstanding may, in accordance with such appropriate procedure as is provided in the agreement or indenture, appoint a trustee to represent all the holders of the bonds, or all the holders of the issue thereof as the case may be, in the matter of exercising and prosecuting on their behalf such rights and remedies as are available to them under the law. The authority shall in its absolute discretion fix the terms and conditions upon which the trustee or trustees shall receive, hold and disburse the revenues and may prescribe the powers and duties of the trustee or trustees.