For each service connection under § 23–202 of this article, the Commission shall set a connection charge that the Commission determines to be reasonable. Subject to a yearly revision by the Commission: for connections of the sizes and classes for which the average cost reasonably may be ascertained, the connection charge shall be uniform throughout the sanitary district; and for all other connections, the connection charge shall be the actual cost. All property owners shall pay the connection charge to the Commission before the actual connection of any line on private property is made. Of the total revenue over actual cost that is derived from the connection charges, the Commission shall: retain one–half of the revenue in a contingency fund for repair, replacement, or any extraordinary expense in the maintenance and operation of water supply or sewer systems under the control of the Commission; and apply one–half of the revenue to pay the Commission’s debt service for outstanding debts.