N.Y.C. Admin. Code § 28-410.1: § 28-410.1 Master fire suppression piping contractor license required.

It shall be unlawful for any person:

1. To perform fire suppression piping work unless such person is a licensed master fire suppression piping contractor or working under the direct and continuing supervision of a licensed master fire suppression piping contractor except that a city employee who holds a master fire suppression piping contractor license may only perform fire suppression piping work on existing buildings in the course of his or her employment.

2. To use the title licensed master fire suppression piping contractor, master fire suppression piping contractor or any other title in such manner as to convey the impression that such person is a licensed master fire suppression piping contractor unless such person is licensed as such in accordance with the provisions of this article.