An operating certificate, issued in accordance with section 29-232-17 shall be valid until expiration unless some defect or condition affecting the safety of the boiler is disclosed, provided an operating certificate issued for a boiler inspected by a special inspector shall be valid for such period without inspection by the department only if the boiler for which it was issued continues to be insured by an authorized insurance company.
Conn. Agencies Regs. § 29-232-18