N.Y.C. Admin. Code § 27-955: § 27-955 Smoke detector alternate.

An approved smoke detection alarm system may be used in lieu of sprinklers in those locations described in subdivisions (o) and (q) of section 27-954 of this article, except in buildings or spaces classified in occupancy group J-1 or J-2. Such smoke detection system shall be of the supervisory type connected to an approved central station.