N.Y.C. Admin. Code § 28-410.7.2: § 28-410.7.2 Identification.

All business vehicles, advertising, websites and stationery used in connection with a master fire suppression piping contractor business shall display prominently the full name of the licensee, the words "N.Y.C. licensed fire suppression piping contractor – class A, B or C," the licensee's number and the licensee's business address. If the business is conducted under a trade name, or by a partnership or corporation, the trade name, partnership or corporate name shall be placed immediately above the full name or names of the licensed master fire suppression piping contractor or licensed master fire suppression piping contractors. Prior to using, the trade name, partnership or corporate name must have been disclosed to the department in a manner required by the department.