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e-Learning Course on the Law of Treaties

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The International Law of Treaties is a set of international principles and rules regulating the conclusion procedure of treaties, as well as the issues of operation, amendments and modifications, termination, suspension and invalidity of treaties. For those involved in drafting, negotiation and conclusion of international treaties, a sound knowledge of the Law of Treaties is indispensable. Moreover, efficient implementation and application of international legal norms is impossible without knowing the essentials of the International Law of Treaties.

Course Objectives

The overall goal of this e-Course is to provide participants with the fundamental theoretical and practical knowledge of the key issues of the International Law of Treaties, as well as a comprehensive understanding of the provisions of the universal conventions as the sources of International Law of Treaties and to develop critical skills of analysis and interpretation of cases regarding contemporary practice.

Learning Objectives

At the end of the course participants will be able to:

  • Demonstrate profound understanding of the basic notions, sources, and principles of the Law of Treaties;
  • Distinguish different stages of the conclusion of a treaty and differentiate between termination and suspension of treaties;
  • Explain the concept of invalidity of treaties and identify its legal consequences;
  • Analyze and interpret treaty provisions using international judicial decisions and opinions in the area of International Law of Treaties;
  • Identify and apply the rules and procedures of International Law of Treaties to practical cases and find the relevant sources of law and build legal arguments;
  • Apply theoretical knowledge and practical skills to their professional activities in fields related to the Law of Treaties for example, preparation of a draft of a treaty, or participation in negotiations and international conferences on the elaboration and adoption of an international treaty.

Content and Structure

The Course consists of four modules:

Module 1: The basic notions, sources, and principles of the Law of Treaties

Module 2: The stages of conclusion of treaties

Module 3: The operation, modifications, termination and suspension of treaties

Module 4: The invalidity, interpretation and consequences of termination and suspension of treaties.


The learning activities are based on sound adult learning pedagogical principles and designed specifically for professionals working full-time. These activities include self-assessment activities, case studies, discussion forums, practical assignments, quizzes, etc.

The course moderators selected by UNITAR are experts in international law from academic and international circles, including practitioners from both within and outside the United Nations system. They will guide participants in their learning process and answer their questions. In addition, UNITAR’s staff will provide them with technical support on how to use the learning tools available on UNITAR’s platform.

UN Photo/Paulo Filgueiras