Apotex received a warning letter from the U.S. Food and Drug Administration (FDA) regarding the Etobicoke plant on June 25, 2009 for good manufacturing practice (GMP) violations. It also received a warning letter citing similar GMP violations in the Signet plant on March 29, 2010. FDA issued an import ban on all drugs manufactured at these two plants and prevented the company from seeking new marketing authorizations in the U.S on August 28, 2009. The import ban was subsequently lifted on May 6, 2011. On February 29, 2012, Apotex filed a claim to the International Centre for Settlement of Investment Disputes seeking arbitration with the U.S.A. In the filing, Apotex cited unfair treatment by FDA which constituted a violation of the North American Free Trade Agreement (NAFTA). Apotex further claimed that the action of FDA 'decimated its business'. On August 26, 2014, NAFTA tribunal rejected Apotex's claim.