N.Y.C. Admin. Code § 10-704: § 10-704 Exception.

This section shall not be interpreted to impair or restrict any law enforcement personnel or employees of governmental agencies or other entities, public or private, who, in the course of their employment, attempt to capture any visual image, sound recording, or other physical impression: (i) of a person engaging in criminal or otherwise illegal activity; or (ii) while conducting an investigation, surveillance, or monitoring of any person to obtain evidence of suspected illegal activity, including the suspected violation of any administrative rule or regulation, a suspected fraudulent insurance claim, or any other suspected fraudulent conduct or activity involving a violation of law or pattern of business practices adversely affecting public health or safety.