SHARJAH — As part of its plans to eliminate health hazards and accidents which jeopardise public life and property, the Sharjah Civil Defence has made it mandatory for outlets, shops, restaurants and other commercial establishments which have not been connected with piped natural gas, to install an automated switch-off device on gas cylinders from July 15. This automatic switch-off device turns off the gas when not in use, thus preventing leakages which have been the cause of a number of explosions of late in the emirate, Colonel Gareeb Shaaban, Director of Civil Defence in Sharjah, has said.