When a substance or mixture presents a serious danger to human health or the environment for reasons relating to its classification, labelling or packaging, the ministers responsible for the environment, health and labour shall, by joint order, take the necessary measures to implement the safeguard clause provided for in Article 52 of Regulation (EC) No, health and labour shall, by joint order, take the necessary measures to implement the safeguard clause provided for in Article 52 of Regulation (EC) No 1272/2008 of 16 December 2008 on classification, labelling and packaging of substances and mixtures, including, where appropriate, restrictions or special requirements for placing the substance or mixture on the market.