Miss. Code § 27-31-9
The board of supervisors of any county having a population of more than forty-two thousand (42,000) according to the most recent federal census and in which there is now or may hereafter be situated a national military park and cemetery, may, in their discretion, exempt from all county ad valorem taxation, for a period of not more than ten (10) years, any parking garage providing motor vehicle parking service to the general public, provided the parking garage is operated solely for the purpose of promoting business and commerce for the benefit of the general public and provided further, that said parking garage shall be operated so that no part of the income therefrom inures to or to the benefit of any person, partnership, firm, association or corporation organized for profit.
Miss. Code § 27-31-9