To ensure the prevention of and protection against explosions, the employer shall take the technical and organisational measures appropriate to the type of operation on the basis of the principles of prevention and in the following order of priority:
1° Prevent the formation of explosive atmospheres;
2° If the nature of the activity makes it impossible to prevent the formation of explosive atmospheres, prevent their ignition;
3° Mitigate the harmful effects of an explosion on the health and safety of workers.