Original rule filed May 13, 1991; effective August 28, 1991. Amendment filed July 3, 1996; effective November 28, 1996. Amendment filed August 29, 2000; effective December 29, 2000. Amendments filed June 28, 2005; effective October 28, 2005. Repeal filed August 10, 2011; effective January 29, 2012.