PART 3 Duties of Welsh Ministers in relation to limit values etc.
Duty in relation to long-term objectives for ozone16
1
The Welsh Ministers must ensure that all necessary measures not entailing disproportionate costs are taken to attain the long-term objectives for ozone set out in Schedule 3 in each zone.
2
Measures taken pursuant to paragraph (1) must be consistent with the programme referred to in paragraph (6) of regulation 14 and the air quality plans prepared in accordance with regulation 20.
3
In zones where the long-term objectives for ozone have been attained, the Welsh Ministers must, insofar as factors including meteorological conditions and the transboundary nature of ozone pollution permit—
a
ensure that they continue to be met,
b
maintain the best ambient air quality compatible with sustainable development, and
c
maintain a high level of protection for the environment and human health.