3 - The Genealogy of the Contemporary Regime of Treaty Interpretation

Summary

This chapter frames the interpretive regime of modern international law as a historical contingency and aims to trace its genealogy through an analysis of the codification process that led to the current regime. The contingency of the rules of treaty interpretation is hardly recognized in the official discourse. Treated as a matter of common sense or trans-historical customary international law, the rules of treaty interpretation set forth in the Vienna Convention on the Law of Treaties have for instance been applied to the interpretation of treaties dating back to the nineteenth century and a whole range of treaties concluded in the twentieth century before the entry into force of the Vienna Convention. There is, however, ample evidence that the interpretive approach of the Vienna Convention has by no means prevailed throughout the history of international law. This chapter identifies a series of factors ranging from the intellectual history of the discipline of international law and the contingencies of the codification process, to the political circumstances of the Cold War era and the rise of permanent international tribunals that can account for the normative outcome of the Vienna Convention regime.