S T A T U T O R Y I N S T R U M E N T S 2010 No. 1001 ENVIRONMENTAL PROTECTION The Air Quality Standards Regulations 2010 Made - - - - 25th March 2010 Laid before Parliament 30th March 2010 Coming into force - - 11th June 2010 The Secretary of State, having been designated(a) for the purposes of section 2(2) of the European Communities Act 1972(b) in relation to the environment, makes the following Regulations under the powers conferred by that section. PART 1 General Citation, commencement, application and extent 1.—(1) These Regulations may be cited as the Air Quality Standards Regulations 2010 and come into force on 11th June 2010. (2) They apply in England, except regulations 3(a), 23, 24, 25(4) and 32 which extend to the United Kingdom(c). Definitions 2. In these Regulations— “ambient air” means outdoor air in the troposphere, excluding workplaces where members of the public do not have regular access; “AOT 40” (expressed in (g/m3)· hours) means the sum of the difference b...