1. Enacted and promulgated a total forty-four Articles by Presidential Order No. 6687 on December 5, 1983, enforced on the date of promulgation
2. Amended and promulgated Article 2 by Presidential Order No. 8900177610 on July 19, 2000
3. Amended and promulgated Article 33 by Presidential Order No. 09100108400 on May 29, 2002
4. Promulgated and added Articles 4-1, 31-1, 31-2, 38-1, 39-1 and 39-2, deleted Section 5 title, Articles 21 to 23 and 42, amended Articles 3, 8, 10, 13 and 20, Chapter VI title, and Articles 31, 34, 39, 43 and 44 by Presidential Order 2 No. 10000246141 on November 9, 2011
5. Amended and promulgated Article 2 by Presidential Order No. 10400077161 on July 1, 2015