Protection of the Environment Operations (Clean Air) Regulation 2010
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Historical versions
Current version 15 Feb 2013 to date
Historical version 6 Jul 2012 to 14 Feb 2013
Historical version 26 Oct 2011 to 5 Jul 2012
Historical version 7 Jan 2011 to 25 Oct 2011
Historical version 24 Dec 2010 to 6 Jan 2011
Historical version 13 Aug 2010 to 23 Dec 2010
Historical version 6 Jul 2012 to 14 Feb 2013
Historical version 26 Oct 2011 to 5 Jul 2012
Historical version 7 Jan 2011 to 25 Oct 2011
Historical version 24 Dec 2010 to 6 Jan 2011
Historical version 13 Aug 2010 to 23 Dec 2010