The Council will review the user charge rates annually and revise the user charge rates as necessary to ensure that the system generates adequate revenues to pay the costs of operation and maintenance including replacement of equipment as well as adequate revenues, to pay the costs of debt service. The Council will budget an annual appropriation that will be placed in the Equipment Revolving Fund to cover the replacement of equipment at the end of the expected life of the equipment or at any time before the useful life due to failure. This amount will also be adjusted annually as needed. The Clerk will notify each user at least annually, in conjunction with a regular bill, of the rate being charged for operation, maintenance including replacement of equipment and debt service of the wastewater treatment facilities.