17.7.79 Official Journal of the European Communities No L 179/1 (Acts whose publication is not obligatory) COUNCIL COUNCIL DIRECTIVE of 25 June 1979 on the approximation of the laws of the Member States relating to the roll-over protection structures of wheeled agricultural or forestry tractors (static testing) (79/622/EEC) THE COUNCIL OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, and in particular Article 100 thereof, Having regard to the proposal from the Commission, Having regard to the opinion of the European Parliament (1), Having regard to the opinion of the Economic and Social Committee (2), Whereas the technical requirements with which tractors must comply pursuant to national laws relate inter alia to roll-over protection . structures and to their attachment to the tractor; - Whereas those requirements differ from one Member State to another; ‘whereas it is therefore necessary that all Member States adopt the same requirements either in addition to or in place of their existing rules in order, in particular, to allow the EEC type-approval procedure which was the subject of 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 () O)J No C 296, 11. 12. 1978, p. 69. (3) OJ No C 128, 21. 5. 1979, p. 18. wheeled agricultural or forestry tractors (3) to be introduced in respect of each type of tractor; Wheretts a harmonized component type-approval procedure for roll-over protection structures and their attachment to the tractor makes it possible for each Member State to check compliance with the common construction and testing requirements and to inform the other Member States of its findings by sending them copies of the component type-approval certificate completed for each type of roll-over protection structure and its attachment to the tractor; whereas the placing of an EEC component type-approval mark on all structures manufactured in conformity with the approved type obviates any need for technical checks on those structures in the other Member States; Whereas common requirements concerning other elements and characteristics of the roll-over protection structure, in particular those concerning the dimensions, doors, safety glass, devices to prevent continuous rolling if the tractor overturns, and protection of passengers, will be laid down at a later date; Whereas the harmonized requirements are intended principally to ensure safety on the road and at work throughout the Community; whereas for this reason it is necessary to introduce the obligation for tractors covered by this Directive to be fitted with roll-over protection structures; whereas until a date to be determined, the tractors referred to in Council Directive 77/536/EEC of 28 June 1977 on the approximation of () OJ No L 84, 28. 3. 1974, p. 10.