Uh I think they would call the city maintenance department and THEY would make that determination not Officer Whoever :>}
How did your ego get so wrapped up in this? How does plumbers doing gas repairs become such an insult to you? Whether someone in the building is authorized to call the plumber directly, or if the phone call is handed to a maintenance man to make, what difference does it make, if an expert is needed, then someone will call a plumber.