The Commission's amended proposal incorporated the substance of the amendments concerning:
- a subsequent reduction in the limit values relating to noise levels and harmful emissions;
- a ban on manufacturing, importing and selling spare parts that do not comply with the requirements of the directive together with a report to the national parliaments, the EP and the Council detailing the effectiveness of this ban;
- greater compliance with the specification of tyre section width on certain vehicles, thus limiting the application of the standard tolerances;
- the proposal to limit tampering restrictions to those cases where it modifies the vehicle's performance and pollutant and noise emissions so as to ensure that the restrictions do not prove an obstacle to owner servicing and maintenance;
- the proposals providing for a subsequent stage during which further noise and atmospheric pollution standards would be adopted following research and an analysis of the cost-benefit ratio;
- clarification as regards the position of vehicles in categories A and B in relation to anti-tampering measures;
- details of the anti-tampering measures without limiting these to vehicles in categories A and B.
However, the Commission did not accept the amendments aimed at:
- modifying the procedure for adapting to technical progress;
- doing away with most of the requirements relating to anti-tampering measures for vehicles in categories C and D;
- significantly increasing the noise limit values for mopeds and motorcycles.
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