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Initial Mutable Rule 217, 30 June 1993
(diff) Amended(1) by Proposal 1635, 25 July 1995
(diff) Infected and Amended(2) by Rule 1454, 7 August 1995
(diff) Amended(3) by Proposal 2507, Mar. 3 1996
(diff) Amended(4) by Proposal 4825 (Maud), 17 July 2005
(diff) Amended(5) by Proposal 4867 (Goethe), 27 August 2006
(diff) Amended(6) by Proposal 5105 (Zefram), 1 August 2007