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Max Planck Encyclopedia of Public International Law [MPEPIL]

Unilateral Acts of States in International Law

Víctor Rodríguez Cedeño, Maria Isabel Torres Cazorla

Subject(s):
Development — Act of state — Sovereignty — Vienna Convention on the Law of Treaties — Treaties, conclusion — Treaties, entry into force — Codification — State practice — Unilateral acts

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

1 A unilateral act of State may be defined as an expression of will emanating from one State or States which produces legal effects in conformity with international law (see also Unilateralism/Multilateralism ). There is a very wide spectrum of behaviours covered by the designation unilateral acts and the differences among legal cultures partly account for the misunderstandings to which this topic has given rise. The former tentative definition is the result of the consensus between two different positions: a) the concept of a juridical act necessarily implies an...
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