Measurement of ozone precursor substances
18.—(1) The Department shall install and operate one or, if it considers it necessary, more measuring stations, to supply data on concentrations of those ozone precursor substances set out in Schedule 10.
(2) When complying with paragraph (1), the Department shall have regard—
(a)generally, to Annex III of the Decision referred to in regulation 11(6); and
(b)in choosing the number and sites of the measuring stations and in their operation, to Schedule 10.