Miss. Code § 51-9-131
In each county of the State of Mississippi which is part of the Pearl River Valley Water Supply District, beginning with the ad valorem tax assessment for the calendar year 1960, payable on or before February 1, 1961, and so long as any bonds issued hereunder are outstanding, the tax collector of said county shall pay into the depository selected by said water district for said purpose the amount of two mills of all ad valorem taxes due by said county to the State of Mississippi which is collected by the tax collector of said county, which may be collected by any other lawful taxing agency of said county and state and for said county, and the State of Mississippi shall continue to levy not less than two mills ad valorem taxes on each county in the district so long as any bonds issued pursuant to this article remain outstanding.
Miss. Code § 51-9-131