April 20, 2010 U.S. Court of Appeals for the Ninth Circuit rules in favor of Rincon. In the State of California's appeal from the district court's holding that the state violated the Indian Gaming Regulatory Act (IGRA), which provided that a state must negotiate in good faith with its resident Native American tribes to reach compacts concerning casino-style gaming on Native American lands, because the state's repeated insistence that a tribe pay a portion of its net revenues into the state's general fund constituted an attempt by the state to impose a tax on the tribe in violation of 25 U.S.C. section 2710(d)(4).