Article 2.5.2.3.6.

All necessary measures shall be taken that do not involve any excessive costs to ensure that the target values and long-term objectives are achieved.

 

For zones and agglomerations where a target value is exceeded, the programme established under Article 2.10.3.1 and, where applicable, an air quality plan shall be implemented to ensure that the target values are achieved with effect from the date stated in Appendix 2.5.3.7, Part B, except where that cannot be done with measures that do not involve any excessive costs.

 

For zones and agglomerations where the ozone levels in the air are higher than the long-term objectives, but lower than or equal to the target values, cost-effective measures shall be prepared and implemented with the aim of achieving the long-term objectives. These measures must be in accordance with the air quality plan and with the programme stated in paragraph 2.