N.Y.C. Admin. Code § 27-1001: § 27-1001 Permit required.

No construction, alteration or removal shall be commenced until a written work permit therefor shall have been issued by the commissioner in accordance with the provisions of article seventeen of subchapter one of this chapter. No equipment shall be placed in operation until an equipment use permit has been obtained in accordance with provisions of article eighteen of subchapter one of this chapter and section 27-997 of article three of this subchapter.