Measurement of nitrogen dioxide in the atmosphere
7.—(1) The Secretary of State shall ensure that measuring stations for measuring the concentration of nitrogen dioxide in the atmosphere are established, and that the concentration of nitrogen dioxide in the atmosphere is measured in accordance with paragraph 4 of Annex III, and Annex IV, to the nitrogen dioxide Directive.
(2) The measuring stations shall be established at sites selected in accordance with paragraphs 1 to 3 of Annex III to that Directive, and in particular in zones where the limit value referred to in regulation 6 is or is likely to be exceeded.