1. Announced on June 21, 1973
2. Amended on December 21, 1976
3. Amended on July 17, 1985
4. Amended on May 14, 1990
5. Amended on May 2, 1994
6. Amended on August 13, 1997
7. Amended on December 29, 1999
8. Amended on September 9, 2002
9. Amended on February 27, 2003
10. Amended on July 13, 2005
11. Amended on June 22, 2006
12. Amended on January 18, 2008
13. Amended on December 30, 2010, taking effect on February 1, 2011
14. Amended on August 11, 2011, taking effect on August 1, 2011
15. Amended on May 21, 2012 , taking effect on August 1, 2012
16. Amended on December 24, 2012 , taking effect on January 1, 2013
17. Amended on August 23, 2013
18. Amended on June 23, 2014
19. Amended on December 18, 2014
20. Amended on September 8, 2017
21. Amended on January 22, 2021
22. Amended on December 29, 2022
23. Amended on September 18, 2023