1. Adopted on January 15, 1973
2. Amended on September 3, 1976
3. Amended on November 25, 1980
4. Amended on February 19, 1997
5. Amended on June 23, 1999
6. Article 2, Article 8 and Article 9, Article 16 and Article 17 amended on August 8, 2001
7. Article 2, Article 7, Article 8, Articles 17-19, Article 25 and Article 27 amended on October 27, 2004
8. Article 15 and 20 amended on December 28, 2012
9.Amended on November 26, 2015 ;effective from January 1st,2016