Section 041-12-2 - Existing Power BoilersA.Rules Applicable to Construction and Installation. The design, construction, construction-related inspection, installation, and stamping of all existing power boilers must comply with the rules of the Board in effect at the time of installation.B.Rules Applicable after Installation. The maintenance, operation, and post-installation inspection of all existing power boilers must comply with the rules of the Board in effect at the time of the maintenance, operation, or post-installation inspection.02-041 C.M.R. ch. 12, § 2