The Relevance of Subsequent Agreement and Subsequent Practice for the Interpretation of Treaties

in Treaties And Subsequent Practice 82 (Georg Nolte, ed., Oxford University Press, 2013)

GWU Legal Studies Research Paper No. 2013-102

GWU Law School Public Law Research Paper No. 2013-102

14 Pages Posted: 10 Jul 2013

See all articles by Sean D. Murphy

Sean D. Murphy

George Washington University - Law School

Date Written: 2013

Abstract

In May 2012, the International Law Commission (ILC) appointed a special rapporteur, Georg Nolte, to complete a project on "subsequent agreements and subsequent practice in relation to the interpretation of treaties." Previously referred to by the name "treaties over time," the project is expected to result by 2016 in a series of "observations" or "conclusions" about how the meaning of a treaty might be determined based, at least in part, on the conduct of the States Parties after the treaty is concluded.

The project raises a large number of interesting issues, some of which concern terminology and line drawing, others that concern theory and history, and still others that concern when and how States and tribunals rely upon this phenomenon. This essay discusses the extent to which subsequent agreements and practice have actually been a relevant or important component of treaty law in the past and present, and what level of importance they might enjoy in the future. In other words, while there are certainly examples of the use of subsequent conduct in different fields of international law, how pervasive is this phenomenon, and is it increasing or decreasing in its relevance?

Keywords: Vienna Convention, treaty interpretation, subsequent agreement, subsequent practice

Suggested Citation

Murphy, Sean D., The Relevance of Subsequent Agreement and Subsequent Practice for the Interpretation of Treaties (2013). in Treaties And Subsequent Practice 82 (Georg Nolte, ed., Oxford University Press, 2013) , GWU Legal Studies Research Paper No. 2013-102, GWU Law School Public Law Research Paper No. 2013-102, Available at SSRN: https://ssrn.com/abstract=2291597

Sean D. Murphy (Contact Author)

George Washington University - Law School ( email )

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