Article 4National emission ceilings
1.
By the year 2010 at the latest, Member States shall limit their annual national emissions of the pollutants sulphur dioxide (SO2), nitrogen oxides (NOx), volatile organic compounds (VOC) and ammonia (NH3) to amounts not greater than the emission ceilings laid down in Annex I, taking into account any modifications made by Community measures adopted following the reports referred to in Article 9.
2.
Member States shall ensure that the emission ceilings laid down in Annex I are not exceeded in any year after 2010.