In 2007 Pesticide Action Network North America and Natural Resources Defense Council (collectively, PANNA) submitted an administrative petition requesting a chlorpyrifos ban. On 10 August 2015, the Ninth Circuit Court of Appeals in PANNA v. EPA ordered the EPA to respond to PANNA's petition by "revokall tolerances for the insecticide chlorpyrifos", den[ying the Petition or a "proposed or final tolerance revocation" no later than 31 October 2015. The EPA was "unable to conclude that the risk from aggregate exposure from the use of chlorpyrifos [met the safety standard of section 408(b)(2) of the Federal Food, Drug, and Cosmetic Act (FFDCA)" and therefore proposed "to revoke all tolerances for chlorpyrifos."