Knowledge to Lead

UNITAR Online Catalogue

Law of Treaties - Webinar track - Spring 2023

Multilateral Diplomacy

26 May 2023
To be confirmed
3 Weeks
Programme Area
Multilateral Diplomacy, International Law, Other
Event Focal Point Email


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 the drafting, negotiation and conclusion of international treaties, a sound knowledge of the Law of Treaties is indispensable. Efficient implementation and application of international legal norms is impossible without knowing the essentials of the International Law of Treaties. UNITAR’s course on the Law of Treaties is designed to cover both the theoretical and the practical aspects of this subject, starting with the basic notions, sources, subjects, principles, and scope of application of conventions forming the base of the Law of Treaties.

This extended edition of UNITAR's traditional online course offers participants the chance to ask questions to a high level expert during a Q&A webinar.

Event Objectives

The overall goal of this self-paced course is to provide participants with the fundamental theoretical and practical knowledge of the key issues surrounding the International Law of Treaties. You will gain a comprehensive understanding of the provisions of the universal conventions as the sources of the International Law of Treaties and developed critical skills of analysis and interpretation of cases regarding contemporary practice.

Learning Objectives

At the end of the course, you will be able to:

  • Demonstrate profound understanding of the key issues of the International Law of Treaties, including knowledge of the important provisions of the universal conventions that form the base of the International Law of Treaties;
  • Identify and apply the rules and procedures of the International Law of Treaties to practical cases, find the relevant sources of law and build legal arguments;
  • Analyze and interpret international judicial decisions and opinions concerning the International Law of Treaties;
  • Apply theoretical knowledge and practical skills to their professional activities in fields related to the Law of treaties. For example, preparing a draft of a treaty, or participating in the negotiations and international conferences on the elaboration and adoption of an international treaty.

Content and Structure

The course combined 30 hours of self-study with a 2 hour Q&A webinar taught by a high-level expert.

The course consists of the following modules:

Module 1 "The Basic Notions, Sources, and Principles of the Law of Treaties":

  • The Basic Notions of the Law of Treaties
  • Who Can Conclude International Treaties?
  • Parties to a Treaty and Third States
  • The Language, Structure and Title of International Treaties

Module 2 "Preparation of Treaty Text, Reservations, and Depositaries":

  • Negotiation and Preparation of the Treaty Text
  • Phases of the Conclusion of Treaties
  • Reservations to Treaties
  • Depositaries of Treaties

Module 3 "The Operation, Termination, Suspension of Treaties and Consequences":

  • Entry into force and application of treaties
  • Amendment, revision and modification of treaties
  • General rules on validity, continuance in force and termination of treaties
  • Termination and suspension of operation of treaties
  • Invalidity of treaties
  • Consequences of the invalidity, termination or suspension of the operation of a treaty
  • The procedure to be followed with respect to invalidity, termination, withdrawal from or suspension of the operation of a treaty
  • Interpretation of Treaties


This course promotes an interactive approach through lessons and multimedia material, stimulating critical thinking.  Each module has its own learning objectives, as well as interactive online lessons, which guide participants through the contents. The lessons are also available in PDF format so participants can work offline. Contents and activities are practice-oriented and under a self-assessment approach, so participants will learn through practical examples and assignments associated with research and case scenarios. This experience will be supported by the UNITAR team, additional resources and material, and visuals such as infographics and videos.

In addition to the online course, a Q&A webinar will take place on 16th June 2023 (tbc).

Targeted Audience

Government officials, international civil servants, lawyers, judges, NGO representatives, academics and private sector professionals in the field of international law and international organizations.

Additional Information

Certificates: Participants who successfully meet the minimum passing requirements at the end of the course will receive a UNITAR Certificate of Completion.

Technical Requirements: 

  • The course is delivered through UNITAR’s Virtual Learning Environment and participants will require a reliable internet connection throughout its duration;
  • The Q&A webinar is delivered via the platform Zoom and participants will require a reliable internet conntection.