(4)It is therefore appropriate to replace Directive 96/82/EC in order to ensure that the existing level of protection is maintained and further improved, by making the provisions more effective and efficient, and where possible by reducing unnecessary administrative burdens by streamlining or simplification, provided that safety and environmental and human health protection are not compromised. At the same time, the new provisions should be clear, coherent and easy to understand to help improve implementation and enforceability, while the level of protection of human health and the environment remains at least the same or increases. The Commission should cooperate with the Member States on the practical implementation of this Directive. That cooperation should, inter alia, address the issue of self-classification of substances and mixtures. As appropriate, stakeholders such as representatives of industry, workers and non-governmental organisations promoting the protection of human health or the environment should be involved in the implementation of this Directive.