§ 47. Cancellation of registration; notice. Such registration may be
cancelled by such board of health or the examining board of plumbers if
so designated by local law for a violation of the rules and regulations
for the plumbing and drainage of such city duly adopted and enforced
therein, after a hearing had before such board of health or the
examining board of plumbers if so designated by local law and upon a
prior notice of not less than ten days stating the ground of complaint
and served on the person charged with the violation, but such revocation
shall not be operative unless concurred in by the local board of
examiners. It shall not be lawful for any person to engage in or carry
on the trade, business or calling of an employing or master plumber in
any of the cities of this state, unless his name and address shall have
been registered in the city in which he carries on or conducts such
business.