Article 5
1. Where Community provisions require application of the principles of GLP following the entry into force of this Directive for tests on chemical products, Member States may not, on grounds relating to the principles of GLP, prohibit, restrict or impede the placing on the market of chemical products if the principles applied by the laboratories concerned are in conformity with those mentioned in Article 1. 2. Should a Member State establish on the basis of detailed evidence that the application of the principles of GLP and the verification of their application for tests on chemical substances show that, although a chemical substance has been examined in accordance with the requirements of this Directive, it presents a danger to man and the environment, the Member State may provisionally prohibit or make subject to special conditions the marketing of that substance on its territory. It shall immediately inform the Commission and the other Member States thereof and give the grounds for its decision. The Commission shall, within six weeks, consult the Member States concerned and then give its opinion and take suitable measures without delay. Should the Commission consider that technical adaptations to this Directive are necessary, those adaptations shall be adopted either by the Commission or by the Council in accordance with the procedure referred to in Article 4. In that case, the Member State which adopted the safeguard measures may maintain them until the entry into force of those adaptations.