R.I. Gen. Laws § 23-27.3-103.0: Installation of service equipment.

When the installation, extension, alteration, or repair of an elevator, moving stairway, mechanical equipment, refrigeration, air conditioning or ventilation apparatus, plumbing, gas piping, electric wiring, heating system, or any other equipment is specifically controlled by the provisions of the code or the approved rules and regulations, it shall be unlawful to use the equipment until a certificate of approval has been issued therefore by the building official or other municipal or state agency having jurisdiction.