Conn. Agencies Regs. § 29-232-17
If a boiler shall, upon inspection by a special inspector, be found to be suitable and to conform to these regulations, the owner or user shall pay directly to the commissioner a fee of fifteen dollars for each boiler required to be inspected by chapter 540 of the General Statutes before an operating certificate shall be issued. If the owner or user of each boiler required to be inspected refuses to allow an inspection to be made or refuses to pay the above fee, the operating certificate shall be suspended by the commissioner until the owner or user complies with the requirements. The owner or user who causes or permits a boiler to be operated without possessing and displaying a valid operating certificate shall be subject to the penalty provided for in Section 29-243 of the General Statutes.
Conn. Agencies Regs. § 29-232-17