Master plumber improperly "covered" for work of another
The plumbing code requires that all plumbing work be performed by or under the direct supervision of a licensed master plumber. The person in charge of the work must be a licensed master plumber and the work must be performed by either that licensed master plumber or a direct employee.
Dep't of Buildings v. Ward (in PDF) , OATH Index No. 1746/11 (Sept. 1, 2011).