N.Y.C. Admin. Code § 28-105.12.7: § 28-105.12.7 Insurance.

Where workers compensation, employee disability or liability insurance is required by law or department rule, the applicant for the work permit shall obtain and include proof of such insurance with the work permit application. The permit shall expire by operation of law if the insurance upon which the permit was conditioned lapses, expires or is cancelled, unless the permit holder files proof of alternate insurance before such event.