Monitoring stations
12.—(1) The Secretary of State must ensure that the requirements in Schedule 2 (relating to the location and number of monitoring stations and position of monitoring equipment) are met.
(2) Subject to any determination under paragraph (3)(b), every AQSR monitoring station which was in operation immediately before the coming into force of this regulation is a monitoring station for the purposes of these Regulations.
(3) The Secretary of State may from time to time—
(a)establish new monitoring stations to measure PM2.5 levels for the purposes of these Regulations; or
(b)determine that a monitoring station is to cease to be used for the purposes of these Regulations, provided that the requirements in paragraph 3 of Schedule 2 (minimum number of monitoring stations) continue to be met.
(4) References to monitoring stations in these Regulations are to monitoring stations for the measurement of PM2.5 levels to which paragraph (2) applies or which are established by the Secretary of State under paragraph (3)(a) except—
(a)in the expression “AQSR monitoring station” and its definition (see regulation 2(1)); and
(b)where specific provision is made in relation to the meaning of “monitoring station” in relation to a time before these Regulations come into force (see regulation 14(5) and the definition of “background monitoring station” in paragraph 5 of Schedule 1).