National
18 May 2026 9:47 AM• 1 week ago• Lim_Rothanaksambath
Cambodia-Thailand Maritime MOU Cancellation Brings Severe Risks, CCRS Lecture Warns
Photo: Cambodian Center for Regional Studies (CCRS), May 18, 2026.
PHNOM PENH – May 18, 2026 – Thailand's cancellation of the 2001 maritime MOU with Cambodia has triggered severe diplomatic, legal, and economic consequences, according to Ambassador Pou Sothirak, who spoke at a public lecture organized by the Cambodian Center for Regional Studies (CCRS) on May 15.
The event, held at AmCam Exchange in partnership with CCRS, drew approximately 100 participants including government officials, diplomats, academics, and students.
Ambassador Pou Sothirak, Distinguished Senior Advisor to CCRS and former Minister of Industry, Mines and Energy, analyzed the ramifications of Thailand's decision on May 5, 2026, to terminate the MOU that had served for 25 years as the sole framework for managing the 26,000-square-kilometer Overlapping Claims Area (OCA).
On diplomatic consequences, he called the cancellation a "watershed shift" in bilateral relations, warning that the absence of a formal legal mechanism significantly increases the risk of maritime confrontations between naval forces and fishing vessels. He noted the cancellation appeared driven by Thai domestic politics, leading to erosion of trust and entrenched nationalist rhetoric.
On legal implications, he explained that Cambodia has formally rejected new bilateral negotiations and invoked compulsory conciliation under the United Nations Convention on the Law of the Sea (UNCLOS), facilitated by Cambodia's ratification of the convention in February 2024. He also expressed concern that the dispute undermines ASEAN's credibility in maritime governance.
On economic consequences, he provided a stark assessment of "profound and unnecessary" loss. Based on exploration data, he estimated the OCA contains approximately 11 trillion cubic feet of natural gas and hundreds of millions of barrels of oil. The MOU's termination eliminates joint development prospects, reducing energy security for both nations.
Despite challenges, Ambassador Pou Sothirak noted diplomatic openings from the 2026 ASEAN Summit in Cebu, citing both prime ministers' willingness to engage in de-escalation. He called to "repackage the spirit of MOU 2001 into a new bottle of wine" serving both nations' interests.
Photo/Source: Cambodian Center for Regional Studies (CCRS), May 18, 2026.
https://camcrs.org/ccrs-public-lecture-cambodia-thailand-maritime-overlapping-claims-area-oca-issues-and-consequences-15-may-2026-amcam-exchange/?fbclid=IwY2xjawR3oFxleHRuA2FlbQIxMABicmlkETFrczBOMmlGQUhzMXVNQndhc3J0YwZhcHBfaWQQMjIyMDM5MTc4ODIwMDg5MgABHiYxIZ5V-dUggVPk-9548IvDWbuOhaqrLwtgoUTvMvdYhOkRj4XAGFWFUIeG_aem_G1UmSn49s1KuSzzX8Z3w8g
Reported by The Khmer Daily Desk
The event, held at AmCam Exchange in partnership with CCRS, drew approximately 100 participants including government officials, diplomats, academics, and students.
Ambassador Pou Sothirak, Distinguished Senior Advisor to CCRS and former Minister of Industry, Mines and Energy, analyzed the ramifications of Thailand's decision on May 5, 2026, to terminate the MOU that had served for 25 years as the sole framework for managing the 26,000-square-kilometer Overlapping Claims Area (OCA).
On diplomatic consequences, he called the cancellation a "watershed shift" in bilateral relations, warning that the absence of a formal legal mechanism significantly increases the risk of maritime confrontations between naval forces and fishing vessels. He noted the cancellation appeared driven by Thai domestic politics, leading to erosion of trust and entrenched nationalist rhetoric.
On legal implications, he explained that Cambodia has formally rejected new bilateral negotiations and invoked compulsory conciliation under the United Nations Convention on the Law of the Sea (UNCLOS), facilitated by Cambodia's ratification of the convention in February 2024. He also expressed concern that the dispute undermines ASEAN's credibility in maritime governance.
On economic consequences, he provided a stark assessment of "profound and unnecessary" loss. Based on exploration data, he estimated the OCA contains approximately 11 trillion cubic feet of natural gas and hundreds of millions of barrels of oil. The MOU's termination eliminates joint development prospects, reducing energy security for both nations.
Despite challenges, Ambassador Pou Sothirak noted diplomatic openings from the 2026 ASEAN Summit in Cebu, citing both prime ministers' willingness to engage in de-escalation. He called to "repackage the spirit of MOU 2001 into a new bottle of wine" serving both nations' interests.
Photo/Source: Cambodian Center for Regional Studies (CCRS), May 18, 2026.
https://camcrs.org/ccrs-public-lecture-cambodia-thailand-maritime-overlapping-claims-area-oca-issues-and-consequences-15-may-2026-amcam-exchange/?fbclid=IwY2xjawR3oFxleHRuA2FlbQIxMABicmlkETFrczBOMmlGQUhzMXVNQndhc3J0YwZhcHBfaWQQMjIyMDM5MTc4ODIwMDg5MgABHiYxIZ5V-dUggVPk-9548IvDWbuOhaqrLwtgoUTvMvdYhOkRj4XAGFWFUIeG_aem_G1UmSn49s1KuSzzX8Z3w8g
Reported by The Khmer Daily Desk
Photo: Cambodian Center for Regional Studies (CCRS), May 18, 2026.
Photo: Cambodian Center for Regional Studies (CCRS), May 18, 2026.
Photo: Cambodian Center for Regional Studies (CCRS), May 18, 2026.