| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
| Brunei Darussalam | April 3, 2008 | Ratification: November 29, 2008 | January 1, 2009 | |
| Cambodia | April 7, 2008 | Ratification: October 27, 2009 | December 1, 2009 | |
| Indonesia | March 31, 2008 | | | |
| Japan | March 28, 2008 | Ratification: October 22, 2008 | December 1, 2008 | |
| Lao People's Democratic Republic | April 4, 2008 | Ratification: October 9, 2008 | January 1, 2009 | |
| Malaysia | April 14, 2008 | | February 1, 2009 | |
| Myanmar | April 10, 2008 | Ratification: October 10, 2008 | December 1, 2008 | |
| Philippines | April 2, 2008 | Ratification: May 31, 2010 | July 1, 2010 | |
| Singapore | March 26, 2008 | Ratification: August 5, 2008 | December 1, 2008 | |
| Thailand | April 11, 2008 | Ratification: May 26, 2009 | June 1, 2009 | |
| Viet Nam | April 1, 2008 | Ratification: October 23, 2008 | December 1, 2008 | |