35 Miss. Code. R. 4-06-01-104
Pursuant to Miss. Code Ann. Section 27-65-19(1)(a)(ii), sales of electricity, current, power, natural gas, liquefied petroleum gas or other fuel for heating, lighting, or other use, and sales of potable water to a church exempt from federal income taxation under 26 USCS Section 501(c)(3) shall be excluded from taxable gross income of the business if the exempt sales are utilized on property that is primarily used for religious or educational purposes. Any church purchasing the above utilities may sign an affidavit attesting to the fact that they are exempt from federal taxation and that they qualify to be exempt from sales tax as provided in Miss. Code Ann. Section 27-65-19(1)(a)(ii). Retailers can accept this affidavit or the 501(c)(3) certificate from the Internal Revenue Service as evidence that the church qualifies for the exemption. This affidavit expires annually. Once the affidavit expires, retailers must obtain a new one to ensure the church is still eligible for the reduced rate.
35 Miss. Code. R. 4-06-01-104