Regulation 10 Interpretation of this Part

In this Part and in Schedule 1—

• “the baseline period” has the meaning given in regulation 7;

• “population exposure” means population exposure to PM_2.5;

• “the Population Exposure Indicator”—

  1. (a)

     for the baseline period is a measure of average population exposure in that period;

  2. (b)

     for a year from 2019 onwards is a measure of average population exposure in the three-year period ending on 31st December in that year,

  calculated in accordance with Schedule 1;

• “the Reference Indicator” for a year is a measure of average population exposure in the three-year period ending on 31st December in the preceding year, calculated in accordance with Schedule 1 and to be used only for the purposes of making the determination required by regulation 8(1)(a) and the calculations required by paragraphs 1(d) and 2(c) of Schedule 1.