Any person holding a vendor's certificate of authority who sells or installs an air contaminant emission control system, or part thereof, in violation of section 218-7.2(b) of this Subpart will thereafter be required to install an air contaminant emission control system, or part thereof, that is in compliance with the provisions of this Subpart, upon demand of the purchaser or registered owner of the vehicle concerned, or at the election of the purchaser or registered owner to reimburse the purchaser or registered owner for the expense of replacement and installation of an air contaminant emission control system, or part thereof that is in compliance.