KUALA LUMPUR — As the conflicts in the Middle East submerge into essentially a stalemate, let us turn our eyes toward another hotspot much closer to home, namely the South China Sea (SCS). It is often tempting to gravitate toward the more visible currents of major power rivalry when discussing the SCS. Yet, beneath these broader strategic overlays, a quieter and arguably more enduring process continues to unfold among the littoral states themselves: the steady, sometimes painstaking effort to manage differences without allowing them to harden into lasting confrontation.
The 2022 agreement between Vietnam and Indonesia on the delimitation of their exclusive economic zones sits squarely within this more understated tradition. It is frequently described as a diplomatic success, but perhaps its greater value lies in what it reveals about how regional actors approach complexity. After more than a decade of negotiations, the agreement does not represent a perfect alignment of legal views or national preferences. Rather, it reflects a carefully calibrated compromise, one that balances legal principle, technical constraints and political reality.
At the heart of the issue was a relatively familiar problem in maritime delimitation: overlapping claims generated by the 200-nautical-mile provision under the United Nations Convention on the Law of the Sea (Unclos). Vietnam’s entitlement extends southward from its mainland coast, while Indonesia’s extends northward from the Natuna islands, creating a zone of intersection in the southern reaches of the SCS. Although the two countries had successfully delimited their continental shelf in 2003, the exclusive economic zone (EEZ) boundary proved more elusive, remaining unresolved for nearly two decades.
Part of the difficulty lay in differing legal interpretations. Vietnam initially favored extending the existing continental shelf boundary to cover the EEZ. Indonesia, however, maintained that the EEZ and continental shelf constitute distinct legal regimes and should therefore be delimited separately. This distinction carried real implications for jurisdiction and resource access, and could not be resolved through purely technical means.
Geography and proportionality further complicated the process. Coastline configurations, relative coastal lengths, and the need to arrive at an equitable solution made it difficult to rely on a straightforward equidistance line. What appears simple on a map becomes, in practice, a balancing exercise across multiple variables.
Political sensitivities added another layer. Incidents involving the detention of Vietnamese fishery vessels by Indonesian authorities periodically strained relations, while domestic expectations in both countries constrained the scope for compromise. The negotiations were therefore as much about managing national perceptions as they were about defining maritime space.
The eventual agreement reflects these layered considerations. It establishes an EEZ boundary distinct from the earlier continental shelf line, aligning with Indonesia’s legal position while remaining acceptable to Vietnam. It also adheres closely to Unclos principles, avoiding more ambiguous or politically sensitive doctrines, and thereby reinforcing a rules-based approach to maritime governance.
Its practical implications are significant. A clearly defined boundary reduces ambiguity in maritime jurisdiction and lowers the risk of enforcement-related incidents. It also creates a more predictable environment for offshore economic activity, particularly in sectors that require long-term investment horizons.
From Indonesia’s perspective, the agreement contributes to a broader objective of maintaining stability in its northern maritime approaches. The Natuna area has drawn increasing attention not only for its strategic location but also for its resource potential. By settling its EEZ boundary with Vietnam, Indonesia removes a layer of uncertainty, allowing it to focus more squarely on governance and enforcement within a clearly defined space. This clarity is particularly relevant for oil and gas exploration and extraction, where legal certainty is essential for attracting investment and managing operational risks.
For Vietnam, the implications are equally meaningful, though somewhat different in emphasis. The agreement helps ease a recurring source of bilateral friction, contributing to a more stable relationship with an important Asean partner. This, in turn, allows Hanoi to manage its broader maritime challenges with greater focus and flexibility.
At the same time, Vietnam’s acceptance of a separate EEZ boundary signals a measure of legal pragmatism. Rather than insisting on extending the earlier continental shelf line, it has opted for a solution that balances legal interpretation with practical outcomes. This approach may strengthen its position as a constructive actor committed to international law.
Perhaps more importantly, the agreement enhances Vietnam’s prospects in offshore energy development. Oil and gas exploration in contested or ambiguous waters carries inherent political and financial risks. Greater clarity over jurisdiction reduces these uncertainties, making it easier to plan projects, engage external partners, and integrate energy resources into national development strategies. In this sense, the agreement contributes not only to stability at sea, but also to economic planning onshore.
This approach is broadly consistent with Indonesia’s wider regional posture. Jakarta has often positioned itself as a proponent of balance — firm in upholding international law, yet cautious about being drawn into overt confrontation. In the SCS context, this translates into an emphasis on legal clarity, functional cooperation and restraint.
Seen from a wider Asean perspective, the Vietnam-Indonesia agreement offers a useful, if not universally replicable, example of how maritime disputes can be managed. It resonates with the spirit of the 2002 Declaration on the Conduct of Parties in the SCS, which emphasizes confidence-building and self-restraint, as well as with ongoing discussions on a Code of Conduct. These regional processes share a common premise: that stability is best preserved not through sweeping resolutions, but through gradual efforts to reduce risk and build trust.
It would be overly optimistic to assume that all SCS disputes can be addressed in a similar manner. The diversity of claims and sensitivities ensures that each case presents its own challenges. Nevertheless, the agreement underscores a broader point — that even in a contested maritime space, negotiated outcomes grounded in international law remain possible.
There are, inevitably, limits. Implementation will require sustained coordination, and broader geopolitical pressures will continue to shape the environment. Yet, such constraints do not diminish the value of incremental progress.
In a region often framed in terms of competition, developments like this serve as a reminder that cooperation, however modest, remains central. SCS may not become a space of full harmony, but through arrangements that prioritize clarity, legality, and mutual benefit, regional states are gradually shaping a more stable and manageable maritime order.