Article R4412-18 of the French Labour Code
Where the technical and organisational measures provided for in Article R. 4412-17 are not feasible in view of the nature of the activity, the employer shall take, in order of priority, the necessary steps to: 1° Prevent the presence in the workplace of ignition sources likely to cause fires or explosions, or the existence of unfavourable conditions which could lead to unstable chemical substances or mixtures having dangerous physical effects;…