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Max Planck Encyclopedia of Public International Law [MPEPIL]

Treaties, Conflicts between

Nele Matz-Lück

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2015. All Rights Reserved.date: 20 January 2020

Subject(s):
Codification — Lex specialis — Peremptory norms / ius cogens — Treaties, interpretation — Vienna Convention on the Law of Treaties — Treaties, effect for third states — Pacta sunt servanda

Published under the auspices of the Max Planck Foundation for International Peace and the Rule of Law under the direction of Rüdiger Wolfrum.

1 The issue of solving conflicts between international treaties is closely linked to the applicability and validity of treaties (Treaties, Validity) and, ultimately, their effectiveness to pursue and achieve their relevant objectives. If rights and duties of parties to an international treaty are unclear due to contradicting rules established by another instrument, the observance of either of the instruments will suffer. A strict notion of conflicts between treaties implies that both cannot be applied simultaneously. To solve the conflict either another rule, eg a...
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