Jump to Content Jump to Main Navigation
Max Planck Encyclopedia of International Procedural Law [MPEiPro]

Expressio Unius (Est) Exclusio Alterius

Alexandre Senegacnik

Content type:
Encyclopedia entries
Product:
Max Planck Encyclopedias of International Law [MPIL]

Module:
Max Planck Encyclopedia of International Procedural Law [MPEiPro]
Article last updated:
February 2018

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 05 February 2023

Subject(s):
International courts and tribunals, procedure — Expressio unius exclusio alterius rule — Object & purpose (treaty interpretation and) — Ordinary meaning (treaty interpretation and) — Consistent interpretation

Published under the direction of Hélène Ruiz Fabri, with the support of the Department of International Law and Dispute Resolution, under the auspices of the Max Planck Institute Luxembourg for Procedural Law.

1 Expressio unius (est) exclusio alterius (sometimes simply referred to as expressio unius) is an interpretative maxim pursuant to which the express mention of an item excludes others. In international law, expressio unius is mainly invoked in the context of treaty interpretation (Treaties, Interpretation of). Whether this maxim is a legal rule or a law of logic has been widely discussed especially in light of its non-inclusion in the customary rules on treaty interpretation codified in the 1969 Vienna Convention on the Law of Treaties (‘VCLT’) (Interpretative...
Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.