Picture courtesy of Amarin

 

A prominent civil society figure has warned that Thailand cannot build a permanent border wall with Cambodia without first cancelling the 2000 Memorandum of Understanding (MOU 2543), arguing that such construction would violate existing bilateral agreements and could have serious legal and diplomatic consequences.

 

The warning was issued on 28 December 2025 by Panthhep Phuaphongphan, President of the Land Watch Foundation of Thailand, following renewed debate over how to address ongoing tensions along the Thai–Cambodian border. His comments came amid heightened public scrutiny after recent military negotiations between the two countries aimed at reducing hostilities.

 

Tensions have escalated in recent weeks due to clashes and military movements along disputed border areas, prompting calls from some quarters for Thailand to build a permanent physical barrier. On 27 December 2025, Thai Defence Minister Gen Natthaphon Narkphanit met Cambodian Defence Minister Gen Tea Seiha for talks that lasted approximately 30 minutes, attracting close international attention.

 

The meeting resulted in a joint statement agreeing to a ceasefire along the border, following the Kuala Lumpur framework. Cambodia accepted a 72-hour ceasefire proposal in exchange for Thailand returning 18 Cambodian soldiers who had been detained as prisoners, an arrangement vetted by secretariat teams from both sides.

 

The negotiations were observed by an ASEAN Observer Team led by Brig Gen Samsul Rizal bin Musa, Assistant Defence Attaché of Malaysia. The presence of observers was intended to ensure transparency and compliance with international standards during the implementation of the agreement.

 

Against this backdrop, Panthhep addressed growing calls to resolve the dispute by constructing a permanent wall. In a Facebook post, he stated that building such a structure would constitute a breach of Article 5 of the 2000 MOU, which prohibits either state from altering the environment in disputed areas while border demarcation is ongoing.

 

MOU 2543 (2000) is a Memorandum of Understanding signed by Thailand and Cambodia on 14 June 2000 concerning the survey and demarcation of their land border. It does not set a new border but establishes a framework for joint cooperation, using historical treaties and maps, through a Joint Border Committee. Its purpose is to peacefully resolve unclear or disputed boundary areas and reduce border tensions through negotiation and technical collaboration.

 

Panthhep wrote that if Thailand wished to proceed with permanent construction, it would first need to cancel MOU 2543. He emphasised that the agreement remains legally binding and that unilateral actions could undermine ongoing border negotiations and regional trust.

 

The statement has added a legal dimension to the debate over border security, highlighting the constraints imposed by existing bilateral frameworks. It also underscores the complexity of balancing domestic pressure for firm action with international obligations.

 

Amarin reported that attention is expected to focus on whether the ceasefire holds and how both governments manage public expectations regarding border security. Any move to amend or cancel the 2000 MOU would likely require significant diplomatic engagement and could reshape Thai–Cambodian relations.

 

Key Takeaways

 

• Panthhep Phuaphongphan said a permanent wall would violate Article 5 of MOU 2543.

• He stated Thailand would need to cancel the 2000 MOU before any such construction.

• His comments follow a 72-hour ceasefire agreement reached on 27 December 2025.

 

Related Stories

 

Thailand-eyes-concrete-wall-solution-for-Cambodian-border-tensions

Anutin-unveils-‘national-fence’-policy-100000-volunteers

 

 Adapted by Asean Now from Amarin 2025-12-28

 

 

 

Don´t worry dude, Cambodia has already broken that one a couple of hundred times.

2 hours ago, Georgealbert said:

the 2000 Memorandum of Understanding (MOU 2543)

It's not legally binding, as are all MOU's.

The best solution is just that Thailand agrees with the border as is done in 1907. All attempt to change it, were lost by Thailand, so accept things you can't change for the good of the country. All the money that is spend and will be spend coyld be used better .

1 hour ago, ikke1959 said:

The best solution is just that Thailand agrees with the border as is done in 1907. All attempt to change it, were lost by Thailand, so accept things you can't change for the good of the country. All the money that is spend and will be spend coyld be used better .

Better used to bolster private bank balances. 

Build the wall. Get Mexico to pay for it. Problem solved.