Missouri Revised Statutes Title XL. Additional Executive Departments § 650.220. Boilers and pressure vessels to conform to rules, exceptions

No power boiler, low pressure boiler or pressure vessel which does not conform to the rules and regulations formulated by the board governing new construction and installation shall be installed and operated in this state after twelve months from the date upon which the first rules and regulations under sections 650.200 to 650.290 pertaining to new construction and installation have become effective, unless the boiler or pressure vessel is of a special design or construction, and is not inconsistent with the spirit and safety objectives of the rules and regulations, in which case a special installation and operating permit may at its discretion be granted by the board.