Cal. Water Code § 78672.5

(a) Any loan contract concerning an eligible, voluntary, cost-effective capital outlay water conservation program shall be supported by, or shall include, all of the following: (1) An estimate of the reasonable cost and benefit of the program. (2) An agreement by the local agency to proceed expeditiously with, and complete, the program. (3) A provision that there shall be no moratorium or deferment on payments of principal or interest. (4) A loan period of not more than 20 years with an interest rate set at a rate equal to 50 percent of the interest rate paid by the state on the most recent sale of state general obligation bonds, to be computed according to the true interest cost method. If the interest rate so determined is not a multiple of one-tenth of 1 percent, the interest rate shall be set at the next higher multiple of one-tenth of 1 percent. The interest rate set for each contract shall be applied throughout the repayment period of the contract. There shall be a level annual repayment of principal and interest on the loans. (5) A provision that the project shall not receive any more than five million dollars ($5,000,000) in loan proceeds from the department. (b) The department shall give preference for loans under this section on the basis of the cost-effectiveness of the proposed project, with the most cost-effective projects receiving the highest preference.