Miss. Code § 27-31-107
Any person, firm or corporation claiming exemptions from municipal or county ad valorem taxation as provided in Sections 27-31-101 through 27-31-117 shall first file an application with the governing authorities of the municipality or the county board of supervisors, as the case may be, on or before June 1 of the year following the year of completion of the new enterprise or completion of the expansion or addition; however, no such application shall be required for, nor shall this section otherwise apply to, any fee-in-lieu of ad valorem taxation, granted pursuant to Section 27-31-104 or 27-31-105(2). Each copy shall be subscribed and sworn to by the individual making the application or, if a firm or corporation, by an officer or person duly authorized to do so. In the application, full information shall be given as to the property proposed to be exempted, the kind of articles to be manufactured, and the date from which exemption is claimed. Each application shall also show an itemized listing of the true value of all such property sought to be exempted. The governing authorities of the municipality or county board of supervisors may, by resolution spread on its minutes, approve such application for all or any part of the property sought to be exempted and for all or any part of the authorized period of exemption. The resolution of approval shall also have an itemized listing of the true value of all property to be exempted. The application, together with the resolution of approval, shall be forwarded to the Department of Revenue within thirty (30) days from the date of the resolution. The department shall proceed to investigate the matter and determine whether the property is eligible for the exemption. After investigation of the eligibility of the property, the department shall certify its determination to the governing authorities of the municipality or the county board of supervisors. If such property sought to be exempted is not eligible for such exemption, as above set forth, the Department of Revenue shall so certify. If the Department of Revenue certifies that the applicant is eligible for an exemption, it shall be discretionary with the board of supervisors or municipal authorities as to whether they grant the exemption, but in no event shall an exemption be granted if the Department of Revenue certifies that the applicant is not eligible for an exemption. The original copy of the application for exemption shall be returned to the governing authorities of the municipality or the county board of supervisors, as the case may be.
Miss. Code § 27-31-107