1.Promulgated on November 19, 1955
2.Amended on March 26, 1960
3.Amended on January 08, 1968
4.Amended on July 18, 1979
5.Amended on May 09, 1980
6.Amended on May 11, 1983
7.Amended on June 02, 1986
8.Amended on May February 26, 1989
9.Amendment and promulgated by President on November 19, 1997.