1.Announced on December 13, 1995
2.Amended on December 31, 1999
3.Amended on December 12, 2001
4.Amended on Oct 20, 2004
5.Amended on January 6, 2006
6.Amended on August 9, 2007
7.Amended on February 15, 2011
8.Amended on June 27, 2014
9.Amended on November 21, 2016