Title 20 of the United States Code: Revision history


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22 September 2023

11 June 2023

12 October 2022

1 August 2022

8 March 2022

27 June 2017

24 November 2015

23 May 2014

26 June 2013

9 June 2012

7 June 2012

28 December 2010

19 March 2010

22 August 2009

20 May 2009

12 April 2009

27 September 2008

5 September 2008

29 February 2008

25 April 2007

10 February 2007

7 February 2007