3. The following certificates of qualification are required for the carrying on of work described for each certificate:(1) certificate in gas piping installation (ITG) for the installation, connection, maintenance, repair, renewal, alteration or removal of any gas piping and its accessories and the connection of any gas piping to the natural gas distribution network or, in the case of propane, to an installation of cylinders or tanks and the connection of gas appliances to such piping;
(2) Class 1 certificate in gas appliance techniques (TAG-1) for the installation, connection, initial start-up, maintenance, repair or removal of any type of gas appliance, including its accessories and exhaust system;
(3) Class 2 certificate in gas appliance techniques (TAG-2) for the installation, connection, initial start-up, maintenance, repair or removal of any type of certified gas appliance with a capacity not exceeding 120 kW, including its accessories and exhaust system;
(4) Class 3 certificate in gas appliance techniques (propane) (TAG-3P) for(a) the installation, connection, initial start-up, maintenance, repair or removal of any certified propane appliance with a capacity not exceeding 120 kW, including the accessories and exhaust system;
(b) the installation, connection, maintenance, repair, renewal, alteration or removal of any propane piping and its accessories, whatever the capacity of the gas appliances supplied;
(c) the installation and connection to a permanent installation of cylinders and tanks having a total water capacity not exceeding 5,000 US gallons (19,000 l), including their accessories, regardless of the capacity of the gas appliances supplied, excluding the accessories and devices used by refuelling stations and filling stations;
(4.1) Class 3 certificate in gas appliance techniques (natural gas) (TAG-3N) for(a) the installation, connection, initial start-up, maintenance, repair or removal of any certified natural gas appliance with a capacity not exceeding 120 kW, including the accessories and exhaust system;
(b) the installation, maintenance, repair, renewal, alteration or removal of any natural gas piping and its accessories, whatever the capacity of the gas appliances supplied;
(c) the connection of any natural gas piping to the natural gas distribution network, whatever the capacity of the gas appliances supplied;
(5) Class 4 certificate in gas appliance techniques (TAG-4) for the installation, connection, initial start-up, maintenance, repair or removal, on a structure that is not connected to an electric power supply and used to shelter persons, of any type of certified propane appliance with a capacity not exceeding 30 kW, including its accessories, exhaust systems, supply lines and cylinders;
(6) certificate in restricted gas appliance maintenance techniques (TERAG) for the maintenance, repair or removal of any type of gas appliance installed on the premises of the employer of the holder of the certificate;
(7) certificate in propane receptacle installation techniques (TIRP) for the installation, initial start-up, maintenance, repair or removal of any installation of cylinders or tanks, of any refuelling station for receptacles and vehicles and any filling station, including accessories such as vaporizers, pumps, compressors, distribution devices and the piping connecting the receptacles and their accessories;
(7.1) (cf. 2014-09-30) certificate in compressed natural gas receptacle installation techniques (TIRGNC) for the installation, initial start-up, maintenance, repair or removal of any compressed natural gas refuelling station;
(7.2) (cf. 2014-09-30) certificate in liquid natural gas receptacle installation techniques (TIRGNL) for the installation, initial start-up, maintenance, repair or removal of any liquid natural gas refuelling station;
(8) certificate in distribution system control (VSD) for the supervision of the quality and regulatory compliance of installation, maintenance, repair or removal work for any transport system, distribution network or natural gas service pipe of a building;
(9) certificate in gas carburetion techniques (TCG) for the installation, putting into service, inspection, maintenance, repair or removal of components, including the fuel tanks, for the supply of gas-powered internal combustion engines and for filling road vehicle tanks and cylinders;
(9.1) Class 2 certificate in gas carburetion techniques (TCG-2) for the installation, putting into service, inspection, maintenance, repair or removal of components, including the fuel tanks, for the supply of compressed natural gas or propane-powered internal combustion engines and for filling vehicle tanks and cylinders with propane;
(9.2) Class 3 certificate in gas carburetion techniques (TCG-3) for the installation, putting into service, inspection, maintenance, repair or removal of components, including the fuel tanks, for the supply of compressed natural gas or propane-powered internal combustion engines;
(10) certificate in propane handling (MP) for the transfer of propane between receptacles or the connection of cylinders of more than 34 kg to a permanent installation;
(10.1) (cf. 2014-09-30) certificate in liquid natural gas handling (MGNL) for the transfer of liquid natural gas between receptacles;
(11) certificate in propane cylinder and vehicle filling (RBVP) for the filling of propane cylinders and fuel tanks of propane-powered vehicles;
(11.1) certificate in propane vehicle filling (RVP) for the filling of fuel tanks of propane-powered vehicles;
(12) certificate in stationary engine mechanics (MMF) to operate, supervise, control or maintain a stationary engine or an installation of stationary engines and see to its repair or alteration, according to the categories and classes established in section 4; and
(13) certificate in pressure installation inspection (IISP) for the inspection of the manufacture, installation, repair or alteration of a pressure installation within the meaning of section 7 of the Building Act (chapter B-1.1).