No L 32/32 Official Journal of the European Communities 3.2.77 COMMISSION COMMISSION DIRECTIVE of 30 November 1976 adapting to technical progress Council Directive 70/220/EEC of 20 March 1970 on the ~ approximation of the laws of the Member States relating to measures to be taken against air pollution by gases from positive-ignition engines of motor vehicles (77/102/EEC) THE COMMISSION OF THE EUROPEAN . COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Directive 70/156/EEC of 6 February 1970 on the approximation of the laws of the Member States relating to the type-approval of motor vehicles and their trailers (), as amended by the Act of Accession{?), and in particular Articles 11, 12 and 13 thereof, Having regard to Council Directive 70/220/EEC of 20 March 1970 on the approximation of the laws of the Member States relating to measures to be taken against air pollution by gases from positive-ignition engines (%), as amended by the abovementioned Act of Accession, and in particular Artigle S thereof, Whereas the programme of action of the European Communities on the environment adopted on 22 November 1973 provides for amendments to Directives adopted so as to take into account the latest scientific progress, with particular reference to (') OJ No L 42, 23. 2. 1970, p. 1. (?) OJ No L 73,27. 3. 1972, p. 115. (*®) OJ No L 76, 6. 4. 1970, p. 1. air pollution by exhaust gases from positive-ignition engines; Whereas the technical progress made in the construction of positive-ignition engines  since Council Directive 70/220/EEC - laid down the permissible limits for carbon monoxide and unburnt hydrocarbon emissions from these engines, which limits were made more stringent by Council Directive 74/290/EEC of 28 May 1974 (%), also enables permissible limits to be laid down for nitrogen oxide emissions; Whereas it is essential that emissions of this latter pollutant from motor vehicles should be restricted with immediate effect in order to establish a basis . for coherent Community action to reduce the limits for the three pollutants which are the subject of the EEC type-approval procedure for these vehicles; whereas in order to protect public health and the environment it is adwvisable to emvisage a further reduction of the limits of these pollutants as soon as the work now in progress has given concrete results; Whereas the measures provided for in this Directive are in accordance with the opinion of the Committee on the Adaptation to Technical Progress () OJ No L 159, 15. 6. 1974, p. 61.