Cambodia Launches UN-Backed Conciliation to Resolve Maritime Dispute With Thailand
Cambodia has made the legal move to make the process of conciliation mandatory for the maritime border issue it has been having with Thailand, in accordance with the international legal principle. It is important to mention here that the decision on the part of Cambodia came into effect on Tuesday, June 2, 2026.
However, it is worth mentioning that the decision of the Kingdom of Cambodia to do so was taken one month after Thailand announced its decision to stop the agreement of 2001 on negotiations about the disputed territory. By stopping the negotiations, the framework of negotiation was ended, leaving few alternatives for Cambodia to pursue.
The Legal Framework Behind Compulsory Conciliation
Compulsory Conciliation is a means within international law by which a dispute can be assessed by an expert panel, without imposing a binding ruling. Compulsory Conciliation differs from either arbitration or adjudication in that there is no legally binding ruling on the two disputing countries, but considerable moral and diplomatic pressure exists.
It will include internationally respected experts who have experience with maritime law and boundary delimitation. They will take into consideration past claims, arguments for the case made by each country, geological assessments and economic implications in making their recommendation for a solution to this long-standing territorial dispute.
“This compulsory conciliation process represents Cambodia’s commitment to resolving our maritime differences through peaceful means and international law,”
stated a senior Cambodian official who spoke on the condition of anonymity regarding specific negotiation details. The official emphasized that Cambodia seeks a fair and lasting resolution that respects both nations’ sovereignty and maritime rights.
Thailand’s Cancellation of the 2001 Agreement Triggers UN Action
Cambodia’s motive to do so was the recent annulment by Thailand of the 2001 Agreement on the Framework for Negotiations on the Delimitation of the Maritime Boundary in the Gulf of Thailand. It was a bilateral agreement which acted as the basis of the maritime negotiations of both the countries over the last two decades. The agreement contained guidelines on joint explorations and boundary discussions.
There have been growing indications from the Thai side regarding their dissatisfaction with the 2001 framework. They were concerned about the equity and progress of the negotiations. There is no clear explanation behind the annulment except that it did not help Thailand in any way with regard to its present geopolitical environment.
“Thailand’s decision to terminate the 2001 agreement left Cambodia with no alternative but to pursue international mechanisms to protect our maritime rights,”
explained the Cambodian official.
“We cannot allow our sovereignty and economic interests to remain in limbo indefinitely.”
The cancellation sent shockwaves through diplomatic circles in Southeast Asia, as the 2001 agreement had been widely regarded as a successful model of bilateral cooperation despite its limitations. Regional analysts noted that the termination reflected broader tensions in Thailand-Cambodia relations, which have been periodically strained by border disputes and historical grievances.
Overlapping Claims in the Gulf of Thailand: The Core Dispute
The dispute is about the overlapping territory, which lies in the Gulf of Thailand. The two countries have conflicting claims over the territory on account of the sovereignty associated with exploring and exploiting the natural resources in the said territory. The overlapping territory covers an area of around 26,000 square kilometers, which supposedly hosts vast amounts of hydrocarbons. These hydrocarbons consist of oil and natural gas reserves. In recent years, the two countries have separately conducted geological surveys of this particular territory. It is believed to have billions of barrels of oil and natural gas.
The overlapping claims stem from differing interpretations of the United Nations Convention on the Law of the Sea (UNCLOS), particularly regarding how maritime boundaries should be drawn from each country’s baseline. Cambodia has advocated for an equidistance line, while Thailand has historically argued for a more favorable boundary based on historical fishing rights and coastal geography.
“The Gulf of Thailand represents one of Southeast Asia’s most promising energy frontiers, and both Cambodia and Thailand have legitimate interests in this resource-rich area,”
noted a regional maritime law expert who has followed the dispute for over a decade.
“The challenge is finding a delimitation that both nations can accept as fair and equitable.”
Economic Implications for Both Nations
Maritime disputes have proven to be a valuable avenue for economic growth for Cambodia, an opportunity which has gone untapped because of the unsettled question of borders. Although there has been economic growth in Cambodia, the economy is still dependent primarily on agriculture, textiles, and tourism. By having control over the contested area, Cambodia would reap substantial economic benefit through the exploitation of its energy resources and fishing industries.
As a relatively advanced economy, Thailand has shown a higher level of initiative when it comes to exploration but has been hindered in its efforts by the ongoing dispute with Cambodia over the disputed waters. Thai energy firms are interested in joint development projects but are reluctant to make large investments due to the ongoing border dispute.
The termination of the 2001 agreement and subsequent initiation of compulsory conciliation has created uncertainty for energy investors in the region. Several international oil and gas companies had been monitoring the situation closely, with some having conducted preliminary exploration studies in the area.
“Investors need legal certainty before committing billions of dollars to offshore energy projects,”
stated a Southeast Asia energy analyst who requested anonymity to discuss client relationships.
“Until this dispute is resolved, the full economic potential of the Gulf of Thailand will remain unrealized.”
Regional and International Reactions
Favorable reception of Cambodia’s move to implement compulsory conciliation by the international community can be said because of the view that Cambodia has taken on how to resolve its dispute in a peaceful manner. Support for Cambodia’s choice by the UN has also been evident because of the view that international law is very important in addressing the problem of demarcating maritime borders. Positive response from ASEAN member countries can be expected because of the belief that compulsory conciliation can yield an acceptable resolution.
However, some observers have noted that compulsory conciliation represents only one step in what could be a lengthy process. The recommendations issued by the conciliation panel will not be legally binding, meaning both Cambodia and Thailand must voluntarily agree to implement them for the dispute to be fully resolved.
Historical Context of Thai-Cambodian Border Relations
This maritime dispute takes place in a larger setting of territorial disagreements between Thailand and Cambodia, particularly the famous border dispute over the Preah Vihear temple. The verdict by the International Court of Justice in 2013 favored Cambodia over the temple but made the surrounding territories contentious.
Over the years, there have been many interactions between Thailand and Cambodia, some of which have been friendly while others unfriendly. Despite the cultural similarity of the two nations, nationalism in both states has at times hindered efforts by diplomats in resolving disputes. Conflicts concerning the boundary at sea have been in existence since the 1990s after explorations were carried out in the region by the two parties. Initially, there was no success in efforts aimed at fostering cooperation because of political developments in the nations.
What Happens Next in the Conciliation Process
The mandatory conciliation process will take up to 12 to 18 months, during which the committee will do comprehensive research, hold hearings, and interact with both disputing sides. The committee will analyze previous treaties, maps of the sea area, geological research, economic information, and then give recommendations for solving the problem.
Both sides would have an opportunity to present their arguments and react to the results of the committee. Recommendations would be published, while discussions would be held in private so that both sides could discuss issues without any prejudice.
In the case where both sides agree with the committee’s recommendations, negotiations concerning the treaty establishing the border line based on those recommendations would take place. If, however, at least one of the sides disagreed with the recommendations, the discussion could continue through other international procedures.
“The success of this process depends on both Cambodia and Thailand demonstrating the political will to reach a compromise,”
observed the regional maritime law expert.
“International mechanisms can provide a framework, but ultimately, the solution must come from the parties themselves.”
Implications for Southeast Asian Maritime Security
A resolution to this conflict may have far-reaching consequences for regional maritime security in the Gulf of Thailand and the South China Sea. Success in negotiations may create a precedent for future disputes, but on the other hand, a prolonged conflict may pose several challenges regarding maritime security in the region.
There have been an increasing number of naval exercises in the Gulf, with Thailand and Cambodia carrying out regular patrols in the contested waters to assert their presence in the area. Occasional incidents at sea have also occurred where naval ships from each nation have had close contact during their patrols.
The result of the mandatory conciliation procedure is expected to have an impact on the way other Southeast Asian countries tackle their disputes in the region, especially in the South China Sea, which is marked by several overlapping claims. A positive outcome may lead other countries to resort to international law rather than negotiation alone.
