Amended eff. 10/7/1970; amended Feb. 17, 1977, eff. 4/1/1977, in counties other than Cook, eff. 7/1/1977, in Cook County; amended Oct. 17, 1979, eff. 11/15/1979; amended Dec. 22, 1981, eff. 1/15/1982; amended June 26, 1987, eff. 8/1/1987; amended Dec. 7, 1990, eff. 1/1/1991; amended June 12, 1992, eff. 7/1/1992; amended May 24, 1995, eff. 1/1/1996; amended 6/11/2009, eff. immediately; amended Aug. 6, 2010, eff. 9/15/2010; amended 12/7/2011, eff. immediately; amended Dec. 29, 2017, eff. 1/1/2018; amended Dec. 10, 2018, eff. 1/1/2019; amended March 8, 2019, eff. 7/1/2019; amended July 20, 2021, eff. 7/20/2021 immediately; reserved Oct. 27, 2022, eff. 1/1/2023; repealed July 18, 2023, eff. 9/18/2023.