The Commission for Energy Regulation (CER) and the Register of Gas Installers of Ireland (RGII) welcome the initiative taken by a number of suppliers to introduce a voluntary policy to only sell gas boilers and spare parts to Registered Gas Installers (RGIs). It is illegal for anyone to carry out gas works in respect of domestic type appliances unless they are an RGI. It is also illegal for anyone to portray themselves as an RGI unless they are registered with RGII.