No L 331/20 Official Journal of the European Communities 27.12. 79 COMMISSION COMMISSION DIRECTIVE of 22 November 1979 adapting to technical progress Council Directive 74/347/EEC on the approximation of the laws of the Member States relating to the field of vision and windscreen wipers of wheeled agricultural or forestry tractors (79/1073/EEC) THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Directive 74/150/EEC of 4 March 1974 on the approximation of the laws of the Member States relating to the type-approval of wheeled agricultural or forestry tractors (1), as last amended by Directive 79/694/EEC (?), and in particular Articles 11, 12 and 13 thereof, Having regard to Council Directive 74/347/EEC of 25 June 1974 on the approximation of the laws of the Member States relating to the field of vision and windscreen wipers of wheeled agricultural or forestry tractors (3), Having regard to Council Directive 77/536/EEC of 28 June 1977 on the approximation of the laws of the Member States relating to the roll-over protection structures of wheeled agricultural or forestry tractors (4), Whereas, in view of experience gained and the provisions adopted concerning roll-over protection structures which affect the configuration of those parts of the tractor superstructure which are of great importance for the field of vision, it is now possible to adapt to technical progress the provisions relating to the field of vision; Whereas traffic safety requirements in respect of wheeled agricultural or forestry tractors have become more stringent; 1 (1) OJ No L 84, 28. 3. 1974, p. 10. (2) OJ No L 205, 13. 8. 1979, p. 17. (3) OJ No L 191, 15. 7. 1974, p. 5. (4y OJ No L 220, 29. 8. 1977, p. 1. Whereas the measures provided for in this Directive are in accordance with the opinion of the Committee for the Adaptation to Technical Progress of Directives for the Removal of Technical Barrieres to Trade in Agricultural and Forestry Tractors, HAS ADOPTED THIS DIRECTIVE: Article 1 Directive 74/347/EEC is hereby amended as follows: 1. The words ‘the field of vision or’ are deleted from Articles 2 and 3. 2. After Article 3, the following new Article 3a is inserted: Article 3a 1. With effect from 1 May 1980 no Member State may, on grounds relating to the field of vision of tractors: — refuse, in respect of a type of tractor, to grant EEC type-approval. to issue the document referred to in the last indent of Article 10 (1) of Directive 74/150/EEC, or to grant national type-approval, — or prohibit the entry into service of tractors, if the field of vision of this type of tractor or of these tractors complies with the provisions of this Directive. 2. With effect from 1 October 1980 Member States: — may no longer issue the document referred to in the last indent of Article 10 (1) of Directive 74/150/EEC in respect of a type of tractor in which the field of vision does not comply with the provisions of this Directive,