Mississippi Code Title 49. Conservation and Ecology § 49-28-33

All special assessments levied under this chapter shall be payable in equal annual installments over a period not to exceed twenty-five (25) years, as determined by the board of commissioners, with interest from the date of the confirmation of the assessment at a rate, to be fixed by the board of commissioners, which will produce sufficient funds for the payment of all or a specified portion of the principal of and interest on the bonds as they mature and accrue and for fees and expenses for a paying agent or trustee, or both for the bonds. The amount to be paid through the special assessments may be limited by the board of commissioners to the amounts needed for the purposes specified in this section. Any property owner who shall not have taken an appeal from the assessment, upon failure to pay the assessment in full within thirty (30) days from the date of confirmation, shall be deemed to have elected to pay the assessment in installments as provided in this section, and shall be deemed to have admitted the legality of the assessment, and the right to contest the validity of the assessment shall be waived. The installments of the assessment shall be due and payable at the same time that the annual real property tax becomes due and payable, commencing with the first county tax levy which is payable after the expiration of thirty (30) days from the date of confirmation of the assessment.