(e) prevent inadvertent operation of any electronic device; and(f) prohibit smoking or naked flames.Purging shall continue until tests indicate the gas installation is completely free of gas at all purge points.9.3.2.2 Purging after completion of workAfter performing any work on consumer piping, all air or inert gas shall be purged from the consumer piping before any attempt is made to light a gas appliance. All branch lines shall be individually purged. Purging shall be completed before gas appliance testing and commissioning commences.9.4 Dealing with dangerous gas installationsImmediate steps shall be taken to make safe any unsafe gas installation or gas appliance that may be discovered.NOTE 1 In New Zealand, the Gas (Safety and Measurement) Regulations 2010 require that when a person carrying out gasfitting has reasonable grounds to believe that an installation presents an immediate danger to life and property they shall notify the owner or occupier of the property and the Technical Regulator.NOTE 2 In Australia, the Technical Regulator may require to be informed and the consumer/operator should also be notified.9.5 Safety requirements in the vicinity of gas leaks or selected gas leaksWhere there is a gas leak or a suspected gas leak or gas is present in the atmosphere, taking into consideration gas type and leakage rates, action shall be taken to ensure —(a) all people in the vicinity are evacuated to a safe distance;(b) the gas supply to the gas installation is isolated;(c) all ignition sources are identified and are safely isolated, or extinguished where possible;(d) all affected spaces are well ventilated to safely disperse any accumulating gas;(e) emergency support services are notified when there is a need; and(f) the owner and occupier of the property are notified of the action taken and the remedial options available.NOTE Warning signs should be used and depending on the severity of the situation it may be necessary to evacuate people from the area.9.6 Safe discharge of static electricityWhen working on piping, any static electricity that may be present in the piping or become present during work shall be discharged safely.NOTE 1 A method of discharging the static electricity is to wet the ground and dampen the pipe at the work area with a wet cloth. Then drape the cloth from the pipe to the ground to provide a path to earth. Under these conditions any static electricity should now have been discharged safely.NOTE 2 When working on electronic devices protection against the buildup of static electrical charge should be considered.9.7 Electrical safety bonding or bridgingTo avoid the risk of potentially fatal electrical shocks where a metal pipe is to be cut, or a gas appliance, component or fitting is to be disconnected from piping, an insulated metallic bridging device shall be