On August 5 2005
Aug. 5, 2005: The NCAA Executive Committee announces a new Native American mascot policy to prohibit NCAA colleges and universities from displaying hostile and abusive racial/ethnic/national origin mascots, nicknames or imagery at any NCAA championships. The policy, which took effect Feb. 1, 2006, prohibits schools with such mascots from hosting any NCAA championship competitions.
Sources:
Sources: “In the Arena: The NCAA’s First Century” by Joseph N. Crowley, NCAA News and Champion magazine archives, the NCAA Media Center, and NCAA record books