Sts. & Hy. Code, § 2701.23

(a) The department may advance funds in the State Highway Account in the State Transportation Fund for all or a portion of the cost of projects approved for bond funding pursuant to this chapter. The director shall first make a finding that there are adequate funds for the advancement without delaying or adversely affecting any other project. The total amount advanced shall not exceed the amount of the unsold bonds which the committee has, by resolution, authorized to be sold for the purposes of this chapter.

(b) All advances shall be subject to the terms and conditions of an agreement between the department and the public entity which will receive the advancement. The agreement shall contain provisions for reimbursement of the State Highway Account from the proceeds of the next bond sale for funds advanced pursuant to this section. Any amounts advanced pursuant to this section shall be repaid with interest at the rate being earned by the Pooled Money Investment Account at the time of the advance. Interest payments shall be made from the funds of the public entity which received the advancement, other than from the proceeds of bonds authorized by this chapter.