Clean Air (Determination of Air Impurities in Gases Discharged to the Atmosphere) Regulations 1983Law:S4351:atom:currency2026-02-19T00:00:00.0000000+08:00Clean Air (Determination of Air Impurities in Gases Discharged to the Atmosphere) Regulations 1983S4351:2011041914262011-04-19T14:26:00.0000000+08:00Clean Air (Determination of Air Impurities in Gases Discharged to the Atmosphere) Regulations 1983Clean Air (Determination of Air Impurities in Gases Discharged to the Atmosphere) Regulations 1983PCO Helpdesklegislation@pco.wa.gov.au