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Max Planck Encyclopedia of Public International Law [MPEPIL]

Pactum de contrahendo, pactum de negotiando

Hisashi Owada

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2021. All Rights Reserved.date: 06 December 2021

Customary international law — Treaties, conclusion — Treaties, entry into force — Good faith — Treaties, invalidity, termination, suspension, withdrawal — Treaties, binding force

Published under the auspices of the Max Planck Institute for Comparative Public Law and International Law under the direction of Professor Anne Peters (2021–) and Professor Rüdiger Wolfrum (2004–2020). 

1 A pactum de contrahendo or pactum de negotiando is a binding legal instrument under international law by which contracting parties assume legal obligations to conclude or negotiate future agreements (see also Treaties). Despite this seemingly straightforward explanation, however, distinguishing a legally binding pactum de contrahendo or pactum de negotiando from non-binding political declaration[s] or statements of intent (Non-Binding Agreements) can be difficult in practice. All such instruments express the parties’ intent to engage in some course of action....
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