In international law, one of the greatest challenges is balancing between political consensus and precision in treaty drafting.
Too often, negotiators face a difficult choice: insist on precise legal language, which may hinder negotiations, or accept flexible, open-ended provisions as the price of achieving consensus.
This creates an important legal paradox:
What facilitates consensus today may become the source of disputes tomorrow.
Drawing on my research in International Water Law, I have observed that treaty provisions drafted with ambiguity may be politically convenient at the time of signing, but they often become significant obstacles to effective implementation and dispute resolution. Every vague provision leaves room for competing interpretations, inconsistent implementation, and, ultimately, future disputes.
When treaty language remains ambiguous, interpreters often turn to the preparatory work and negotiating records. As recognized in Article 32 of the Vienna Convention on the Law of Treaties (1969), these supplementary means of interpretation may provide valuable evidence of the parties’ common intention and help resolve competing interpretations.
The fundamental question is this: Should the success of an international treaty be measured simply by its conclusion, or by the long-term ability of its provisions to guide States when difficult legal questions arise years later?
Investing in precise treaty drafting, however challenging during negotiations, is one of the most important safeguards for the long-term effectiveness of international agreements.