REVENUE FOR PAYMENT OF LEASE RENTAL.

(a) All money due the lessor under the lease shall be payable solely from the revenue derived by the district from the sale of water supplied through the leased system.

(b) The board shall set and collect charges for the water supplied through the leased properties to produce sufficient revenue at all times to allow for delinquencies and to pay promptly all rental payments becoming due under the terms of the lease. The board may agree to deposit this money in a separate fund as a first charge on the gross revenue received each year from sales of water, and which shall not be used for any other purpose.

(c) The board may agree in the lease to pay all expenses of operating and maintaining the leased properties from the fund provided by the board each year for the maintenance and operation expenses of the district so that the gross revenue from sale of water will be available exclusively for payment of rentals until the amount required for rentals each year is paid into the separate rental fund.

(d) If the board includes this agreement in the lease, the board shall provide for the payment of sums into the maintenance fund from sources other than the remaining portions of the gross revenue from the sale of water not required to pay rentals which are sufficient each year to pay all expenses of operating the district and maintaining and operating its properties and facilities, including the leased properties.