N.Y.C. Admin. Code § 22-904: § 22-904 Affirmative defenses.

It is an affirmative defense to an allegation of commercial tenant harassment of the kind described in paragraphs 2, 3, 4, 6, 7, 8, 9 and 10 of subdivision a of section 22-902 that (i) such condition or service interruption was not intended to cause any commercial tenant to vacate a covered property or waive or surrender any rights in relation to such covered property, and (ii) the landlord acted in good faith in a reasonable manner to promptly correct such condition or service interruption, including providing notice to all affected lawful tenants in a covered property of such efforts, where appropriate.

(L.L. 2016/077, 6/28/2016, eff. 9/26/2016)