522 Mass. Reg. 1.08
All new Boilers, Pressure Vessels, or other pressure-retaining items installed, unless otherwise exempted, shall be designed and constructed in accordance with the ASME Code or a nationally recognized Code of Construction adopted in 522 CMR. All new pressure-retaining items installed in this jurisdiction shall be marked in accordance with the Code of Construction and shall be registered with the National Board in accordance with NB-264, Criteria for Registration of Boilers, Pressure Vessels and Other Pressure-retaining Items. Pressure-relieving devices shall be constructed to the ASME Code and certified by the National Board in accordance with NB-500, Criteria for Certification of Pressure Relief Devices. These registration documents shall be kept on file at the location of the Boiler or Pressure Vessel, and shall be always accessible to the Division and Authorized Inspectors.
522 CMR 1.08