Eff. 12/31/72; AMD, Eff. 6/4/77; AMD, 1980 MAR p. 2970, Eff. 11/29/80; TRANS, from Dept. of Prof. & Occup. Lic., Ch. 274, L. 1981, Eff. 7/1/81; AMD, 1982 MAR p. 1603, Eff. 8/27/82; AMD, 1985 MAR p. 108, Eff. 2/1/85; AMD, 1991 MAR p. 2435, Eff. 12/13/91; AMD, 1994 MAR p. 1424, Eff. 5/27/94; AMD, 1996 MAR p. 418, Eff. 2/9/96; AMD, 2000 MAR p. 2681, Eff. 10/6/00; AMD, 2005 MAR p. 1686, Eff. 9/9/05; AMD, 2005 MAR p. 1687, Eff. 9/9/05; TRANS, from Commerce, & AMD, 2006 MAR p. 2035, Eff. 8/25/06; REP, 2011 MAR p. 2144, Eff. 10/14/11.