Duty of the Welsh Ministers to limit exposure to PM2·5
19.—(1) The Welsh Ministers must ensure that all necessary measures not entailing disproportionate costs are taken to reduce exposure to PM2·5 with a view to attaining the national exposure reduction target by 2020.
(2) The Welsh Ministers must ensure that all appropriate measures are taken with a view to ensuring that the average exposure indicator for 2015 does not exceed 20 μg/m3.
(3) In this regulation—
“average exposure indicator” (“dangosydd cysylltiad cyfartaleddog”) means the indicator for PM2·5 calculated by the Secretary of State in accordance with regulation 23 of the Air Quality Standards Regulations 2010(1); and
“national exposure reduction target” (“targed cenedlaethol ar gyfer lleihau cysylltiad”) means the target for PM2·5 established by the Secretary of State in accordance with regulation 24 of those Regulations.
S.I. 2010/1001.