Miss. Code Ann. § 21-27-57: Miss. Code Ann. § 21-27-57

In the authorizing order or ordinance, the governing authorities of the municipality shall set aside monthly and shall pledge the revenues of the system or combined system, in separate and special funds as follows: (1) operation and maintenance fund; (2) depreciation fund; (3) bond and interest fund; (4) contingent fund. A sufficient amount shall be set aside each year for the retirement of the bonds and interest. Any surplus revenue remaining shall be disposed of by the governing authorities of the municipality as they may determine from time to time for the best interest of the municipality. However, in the segregation into the several funds the governing authorities may prescribe a reasonable excess amount to be placed in the revenue bond and interest fund from time to time during the earlier years of maturity of such bonds so as to thereby provide and produce a cushion fund to meet any possible deficiencies therein in future years. In the event such excess amounts are provided in the earlier years, the same would be available for such purposes. Bonds pursuant to the authority granted in Sections 21-27-23 and 21-27-51 , shall be payable solely from revenues of said project and out of the bond and interest fund.