It shall be unlawful for any person to cause or permit any job of mechanical or HVAC, gas piping or making any gas connection incident to any property owned, managed, or controlled by such person unless the fitter performing such work has been registered as required by this division and has received a permit from the chief building official for such particular work; and any such person causing or permitting any such work to be done in violation of the provisions hereof shall be guilty of a violation of this division and subject to the penalties hereinafter provided for such violation.