Miss. Code Ann. § 45-23-11: Miss. Code Ann. § 45-23-11

No boiler or pressure vessel which does not conform to the rules and regulations of the board governing new construction and installation shall be installed and operated in this state after twelve (12) months from the date upon which the first rules and regulations under this chapter pertaining to new construction and installation shall have become effective, unless the boiler or pressure vessel is of special design or construction and is not inconsistent with the spirit and safety objectives of such rules and regulations, in which case a special installation and operating permit may, at its discretion, be granted by the board.