| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
| Brunei Darussalam | February 26, 2009 | Ratification: September 9, 2009 | May 17, 2010 | |
| Cambodia | February 26, 2009 | Ratification: September 30, 2009 | May 17, 2010 | |
| Indonesia | February 26, 2009 | Ratification: March 23, 2010 | May 17, 2010 | |
| Lao People's Democratic Republic | February 26, 2009 | Ratification: November 27, 2009 | May 17, 2010 | |
| Malaysia | February 26, 2009 | Ratification: June 17, 2009 | May 17, 2010 | |
| Myanmar | February 26, 2009 | Ratification: August 28, 2009 | May 17, 2010 | |
| Philippines | February 26, 2009 | Ratification: August 11, 2009 | May 17, 2010 | |
| Singapore | February 26, 2009 | Ratification: April 2, 2009 | May 17, 2010 | |
| Thailand | February 26, 2009 | Ratification: April 30, 2010 | May 17, 2010 | |
| Viet Nam | February 26, 2009 | Ratification: July 1, 2009 | May 17, 2010 | |