Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall be applicable. Where, in any specific case, different sections of 780 CMR specify different materials, methods of construction or other requirements, the most restrictive shall govern.
EXCEPTION: Where enforcement of a provision of 780 CMR would violate the conditions of a listing or manufacturer's instructions, the conditions of the listing and manufacturer's instructions shall apply.
780 CMR, ch. 51, ch. 1, pt. 1, 101, R102.1