Miss. Code Ann. § 31-15-21: Miss. Code Ann. § 31-15-21

Any bonds heretofore or hereafter issued under authority of Sections 21-27-11 , 21-27-23 , 21-27-41 through 21-27-43 , or revenue bonds payable from funds other than the proceeds of ad valorem taxes heretofore or hereafter issued under authority of any other law of the State of Mississippi may be refunded upon surrender, whether such bonds are due, optional, or not yet matured. Such refunding bonds shall be negotiable, shall be authorized by resolution adopted by the board or governing body which shall have authorized the bonds that are being refunded, and may either be delivered in exchange for the bonds to be refunded or sold at not less than par and the proceeds applied to the retirement of such bonds.