The worker shall immediately alert the employer to any work situation which he has reasonable cause to believe presents a serious and imminent danger to his life or health, as well as to any defect he observes in the protective systems.
He may withdraw from such a situation.
The employer may not require a worker who has exercised his right to withdraw to resume his activity in a work situation where there is still a serious and imminent danger resulting in particular from a defect in the protection system.