N.Y.C. Admin. Code § 12-202: § 12-202 Commissioner of citywide administrative services to conduct examinations for licenses for master plumbers.

The commissioner of citywide administrative services, in addition to his or her other powers and duties, shall formulate and conduct examinations to determine the merit and fitness of applicants who apply, pursuant to section 26-143 of the code, to the commissioner of health for licenses to engage in the trade, business or calling of a duly registered and licensed master plumber. The department of citywide administrative services shall keep in its office an official roster of candidates who have succeeded in passing such examinations and shall certify to the commissioner of health the names of such candidates who are successful.