N.Y. Multiple Residence Law § 302-a: Unlawful occupation

§ 302-a. Unlawful occupation. 1. If any dwelling or structure be

occupied in whole or in part for human habitation in violation of

section three hundred two of this article, no rent shall be recovered by

the owner of such premises for said period, and no action for possession

of said premises for nonpayment of such rent shall be maintained

therefor.

2. The department charged with the enforcement of this chapter may

cause to be vacated any dwelling or any part thereof which contains a

nuisance as defined in section three hundred five of this article, or is

occupied by more families or persons than permitted in this chapter, or

is erected, altered or occupied contrary to law. Any such dwelling shall

not again be occupied until it or its occupancy, as the case may be, has

been made to conform to law.