“ 12.2.1 The service line of each building must come out of the ground before entering the building and it must be equipped with a service shut-off valve outside the building.
However, if the location where the service line comes out of the ground presents a danger and the service line cannot be protected, it must enter the building below ground level and be equipped with an underground service shut-off valve located outside the building and with another service shut-off valve inside, as near as possible to the foundation wall.
12.2.2 The service shut-off valves outside the ground must be easily accessible for their operation. The expression “easily accessible” means within reach, without it being necessary to climb, remove an obstacle or use a mobile ladder.
12.2.3 Before supplying gas to an installation, a piped gas undertaking must affix to the building, above any service entrance, a distinctive mark that can be seen at all times.
12.2.4 The piped gas undertaking must notify all users affected by an interruption of service and ensure that the service is restored safely.”.