1.Promulgated on January 20, 1961
2.Amended on June 11, 1982
3.Amended on December 26, 1986
4.As amended on June 24, 1998 and effective on December 24, 1998
5.Articles 8, 54, and 56 as amended and effective on July 10, 2002
6.Articles 7and 56 as amended on December 30, 2009
7.Amended on December 2, 2015