(As amended Apr. 30, 1979, eff. Aug. 1, 1979; Mar. 10, 1986, eff. July 1, 1986; Apr. 30, 1991, eff. Dec. 1, 1991; Apr. 22, 1993, eff. Dec. 1, 1993; Apr. 27, 1995, eff. Dec. 1, 1995; Apr. 24, 1998, eff. Dec. 1, 1998; Mar. 26, 2009, eff. Dec. 1, 2009.)