In August 2013 , a U.S. District Court denied the federal government 's motion for complete dismissal of a state of Oklahoma lawsuit , Pruitt v. Sebelius , challenging some tax aspects of the ACA .
In August 2013 , a U.S. District Court allowed the lawsuit to proceed .
In August 2013 , a U.S. District Court denied the federal government 's motion for complete dismissal of a state of Oklahoma lawsuit , Pruitt v. Sebelius , challenging some tax aspects of the ACA , and allowed the lawsuit to proceed .