(As amended Apr. 30, 1979, eff. Aug. 1, 1979; Pub. L. 100–690, title VII, § 7111, Nov. 18, 1988, 102 Stat. 4419; 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; Apr. 29, 2002, eff. Dec. 1, 2002; Apr. 25, 2005, eff. Dec. 1, 2005; Mar. 26, 2009, eff. Dec. 1, 2009; Apr. 28, 2010, eff. Dec. 1, 2010; Apr. 26, 2011, eff. Dec. 1, 2011; Apr. 28, 2016, eff. Dec. 1, 2016; Apr. 27, 2017, eff. Dec. 1, 2017.)