7.12.81 Official Journal of thc European Communmes No L 351/5 COMMISSION COMMISSION DIRECTIVE of 23 October 1981 adapting to technical progress for the third time Council Directive 67/548/EEC on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (81/957/EEC) THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (1), as last amended by Directive 79/831/EEC (2), and in particular Articles 19, 20 and 21 thereof, Whereas Annex I to Directive 67/548/EEC contains a list of dangerous substances, together with particulars of the classification and labelling procedures in respect of each substance (danger symbol, nature of risks and safety advice); Whereas examination of the list of dangerous substances has shown that this list needs to be adapted in the light of present scientific and technical knowledge or, more precisely, that it is necessary to change the classification and labelling of certain substances, to clarify certain names, to enter other substances on the list and to give additional explanatory notes to that list; Whereas the measures provided for in this Directive are in accordance with the opinion of the Committee on the Adaptation to Technical Progress of the Directives for the Elnmlnanon of Technical Barriers to Trade in Dangerous Substances and Preparations, (1) OJ No 196, 16. 8. 1967. p. 1. (3) OJ No L 259, 15. 10. 1979, p. 10.