Eff. 12/31/72; AMD, Eff. 1/5/74; AMD, 1979 MAR p. 1004, Eff. 8/31/79; AMD, 1979 MAR p. 1304, Eff. 10/26/79; AMD, 1982 MAR p. 102, Eff. 1/29/82; AMD, 1982 MAR p. 2153, Eff. 12/17/82; AMD, 1983 MAR p. 1266, Eff. 9/16/83; AMD, 1986 MAR p. 2068, Eff. 12/27/86; REP, 1988 MAR p. 746, Eff. 4/15/88.