Except as provided in Section 19-5-177(1)(e), the board of commissioners of the district issuing bonds pursuant to Sections 19-5-151 through 19-5-207 shall prescribe and collect reasonable rates, fees, tolls or charges for the services, facilities and commodities of its system or systems; shall prescribe penalties for the nonpayment thereof; and shall revise such rates, fees, tolls or charges from time to time whenever necessary to insure the economic operation of such system or systems. The rates, fees, tolls or charges prescribed shall be, as nearly as possible, such as will always produce revenue at least sufficient to:
Miss. Code § 19-5-195