The EPA is proposing to revoke the approvals for all chlorpyrifos containing substances. The approvals under the Hazardous Substances and New Organisms Act 1996 for the import and manufacture for release for chlorpyrifos and chlorpyrifos containing substances are proposed to be revoked. It is proposed that there are non-negligible risks to the environment and to human health. These risks cannot be sufficiently mitigated through restrictions, to a point where the benefits would outweigh these risks. The EPA therefore proposes that the approvals should be revoked with a 6 month phase out period from the date of decision. Additional restrictions on the use of chlorpyrifos containing substances are proposed over the period of the restriction. The assessment of risks, benefits and the proposed revocation of the approvals are detailed in the application and staff assessment report. Similar regulatory action has been undertaken by other regulators internationally, with chlorpyrifos not permitted for use in Canada and the European Union, and significant restriction in Australia. We also note that chlorpyrifos is proposed to be listed for elimination under the Stockholm Convention.