N.Y.C. Admin. Code § 28-116.4.1: § 28-116.4.1 Issuance of certificate of compliance.

The following types of service equipment shall not be operated until the department issues a certificate of compliance after submission of a satisfactory report of inspection and testing of such equipment in accordance with this code and all required submittal documents:

1. Air-conditioning, ventilation and exhaust systems

2. Elevators, escalators, moving walkways and dumbwaiters

3. Fuel burning and fuel-oil storage equipment

4. Refrigeration systems

5. Heating systems

6. Boilers.

Exception: A certificate of compliance shall not be required in connection with work specifically exempted from permit requirements in accordance with this code or department rules.