35 Miss. Code. R. 3-10-05-105
Corporations and organizations coming within the scope and purview of the exemption authorized by Section 27-7-29, may, in lieu of the application required, file with the Commissioner a copy of the Internal Revenue Service exemption application and determination letter. To the extent that the corporation or organization has been classified by the Internal Revenue Service as exempt under the provisions of Federal Code Section 501 and regulations relating thereto and to the extent that such corporation or organization is not otherwise disqualified for the exemption authorized by the provisions of Section 27-7-29, the Commissioner shall determine such organization as exempt from the filing of income tax returns. Any change made by the Internal Revenue Service in the exempt status of the corporation will automatically and simultaneously cancel the exemption for Mississippi tax purposes. If the corporation whose, exempt status has been changed by the IRS, has reason to believe that its exempt status for Mississippi tax purposes remains unchanged, such corporation, by application may apply to the Commissioner for exemption. The Commissioner may require such additional information or documentation as he may deem necessary and pertinent in determining the exempt status of a corporation or organization making application for exemption on the basis of IRS exemption application and determination letter.
35 Miss. Code. R. 3-10-05-105