The U.S. Supreme Court agreed last September 2006 to take up the issue of when a teachers' union may spend the money it collects in the form of "agency fees" from nonmembers on political causes. The justices said they would review a Washington state law that requires nonmembers to "affirmatively consent," or opt in, before a union may spend money from such fees on political campaigns and similar activism. On another education front, the court also agreed to take up a case involving the federal impact-aid statute and when states may reduce their funding to districts with large federal land holdings or installations by the same amount of aid provided by the federal government.