New fire detecting systems shall be of the coded type where the system contains three or more fire detecting circuits, or where the aggregate protected floor area exceeds 20,000 square feet, except that a non-coded type system, with an annunciator located at a place within the building where an authorized person is on duty at all times, will be permitted when approved by the department.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 1501.7