The 1966 Geneva Agreement: Caracas’ last-ditch attempt

May 11, 2026 Letters

---

Dear Editor,

The 1966 Geneva Agreement goes to the heart of what many international lawyers see as the central weakness in Venezuela’s current legal posture before the International Court of Justice.
The Venezuelan argument has political and diplomatic logic, but it is considerably weaker as a matter of treaty interpretation and international law. The core difficulty for Caracas is what the Agreement omitted – it had not expressly annulled, revoked, suspended, or replaced the 1899 Arbitral Award. And that omission is enormously important legally. But what did the 1966 Geneva Agreement actually say?

The Agreement states that a controversy arose because Venezuela contended that the 1899 Award was “null and void.” That wording matters. The treaty does not say: the 1899 Award was null and void, or that the parties agreed it was invalid, or that the boundary ceased to exist. Instead, the Agreement merely records the existence of a Venezuelan contention.

The ICJ itself emphasized this distinction in its 2020 jurisdiction judgment. The Court specifically stated that the use of the phrase “Venezuelan contention” demonstrated that Venezuela challenged the Award, while Britain/British Guiana did not accept that challenge. That ruling is devastating to Venezuela’s argument that the Geneva Agreement somehow automatically extinguished the 1899 Award.

The legal problem for Venezuela under international law is that arbitral awards are presumed final and binding unless: 1. both parties mutually agree to nullify them, or 2 a competent tribunal sets them aside. Neither one of these two conditions was met.

The 1966 Agreement created a mechanism to address Venezuela’s complaint. It did not itself adjudicate the complaint. And this is where Venezuela’s argument becomes strained. Caracas is effectively trying to transform: “Venezuela alleges the Award is invalid” into: “All parties accepted the Award was invalid.” Those two postures are not the same thing. And the treaty text does not support the second proposition either. But why Venezuela keeps pushing this argument? There is perhaps a strategic rationale behind it.

Venezuela’s lawyers are trying to persuade the Court that: the Geneva Agreement replaced judicial settlement with political negotiation, that the parties intended an open-ended diplomatic process, and therefore the ICJ should not “revive” or definitively validate the 1899 Award. In short, Venezuela wants the Court to see the Geneva Agreement as: a reset, and not merely a dispute-management framework. That argument has some superficial diplomatic appeal because: a Mixed Commission was created, negotiations continued for decades, and the parties sought a “practical settlement.” But legally, there is a major obstacle: The Agreement never altered the operative frontier on the ground. Guyana continued to possess and administer the territory, maps remained consistent internationally, no interim sovereignty arrangement was created, no joint administration emerged, and no territorial transfer occurred. In practice, the 1899 boundary continued functioning as the de facto and de jure frontier.

Article V of the 1966 Geneva Agreement is especially damaging to Venezuela. It is one of the most overlooked provisions of the Agreement. It essentially preserves existing claims and legal positions pending settlement: this effectively means that Guyana preserved reliance on the 1899 Award, that Venezuela preserved its objection, hence neither side surrendered its legal case. It also means that this development strongly undercuts the Venezuelan narrative that the Agreement erased the 1899 Award altogether. Indeed, many scholars interpret Article V as preserving the legal status quo while negotiations proceeded.

The ICJ already signaled its view. The Court’s 2020 ruling was extremely revealing. It held that the Geneva Agreement concerns: “the validity of the 1899 Award,” and “its legal implications for the boundary.”

That wording is crucial. The Court did not say: the Award had already been displaced, or that the Geneva Agreement superseded it. Rather, the Court treated the validity question as still unresolved and properly before the Court. That posture strongly suggests that the judges are not persuaded by Venezuela’s “automatic nullification” theory.

But there is a deeper strategic weakness in Venezuela’s case. It is also a structural problem. If Venezuela argues: that “The 1899 Award is already nullified by the Geneva Agreement,” then one would naturally ask:

* Why did the Geneva Agreement establish mechanisms to seek settlement? Why create a Mixed Commission? Why involve the UN Secretary-General? And Why continue negotiations for decades? Those mechanisms only make sense if the validity issue remained disputed and unresolved. In other words: the Geneva Agreement presupposes a controversy, not a settled nullification.

My layman’s assessment: I believe that Venezuela’s argument has political resonance domestically, that it evokes a historical emotional appeal, and emphasizes a rhetorical force against colonial-era arbitration. But before a court of law, particularly the ICJ, its weaknesses are substantial.

The strongest legal position still appears to be Guyana’s: the 1899 Award was valid and binding, Venezuela later challenged it, the Geneva Agreement merely established procedures to examine and resolve that challenge, but did not itself overturn the Award. And this is also broadly consistent with the text of the treaty, state practice after 1966, UN handling of the matter, and the ICJ’s own prior reasoning. My forecast remains that the Court is more likely than not to uphold the validity of the 1899 Award and reject Venezuela’s interpretation of the Geneva Agreement.

Sincerely,
Prof. Daniel K. Gibran

---

• 1899 Arbitral Award, 1966 Geneva Agreement, Caracas, Guyana, ICJ, Venezuela

---