New York Laws
Article 4 - Plumbing and Drainage
51 - Notice of Violation of Rules.

ยง 51. Notice of violation of rules. Whenever any inspector or other
person reports a violation of any such rules and regulations for
plumbing and drainage, or a deviation from any officially approved plan
or specification for plumbing and drainage filed with any board or
department, the appointing power shall first serve a notice of the
violation thereof upon the master plumber doing the work, if a
registered plumber.