Treaties, Conventions and International Agreements

Introduction

International agreements are among the principal instruments through which states create legal obligations and establish frameworks for international cooperation.

The term treaty is often used broadly, but international legal instruments may have different names, forms and functions, including conventions, protocols, covenants, charters, agreements and memoranda of understanding.

Core Terms

Treaty: An international agreement concluded between states in written form and governed by international law.

International Agreement: A legally or politically significant agreement between international actors, depending on its form and governing law.

Convention: A formal international agreement, often multilateral and dealing with a particular subject.

Covenant: A formal international agreement, especially terminology historically associated with major human rights instruments.

Charter: A foundational international instrument establishing the purposes, principles or institutional structure of an organization.

Protocol: An instrument that supplements, modifies or provides additional commitments related to an existing treaty.

Pact: A formal international agreement, often concerning important political or security matters.

Accord: A general term for an international agreement.

Treaty-Making Process

Negotiation: The process through which states develop the text of an agreement.

Adoption: Formal acceptance of the text of a treaty by the participating negotiating states.

Signature: Formal signing of a treaty by an authorized representative.

Ratification: Formal confirmation by a state of its consent to be bound by a treaty after completion of its required domestic procedures.

Acceptance: A method through which a state expresses consent to be bound by a treaty.

Approval: Another possible method of expressing consent to be bound, depending on the treaty and domestic legal system.

Accession: The process through which a state becomes a party to an existing treaty without having signed it during the original signing period.

Consent to Be Bound: The legal act through which a state accepts treaty obligations.

Entry Into Force

Entry Into Force: The point at which a treaty becomes legally binding according to its terms.

Depositary: The state, international organization or designated authority responsible for performing administrative functions relating to a treaty.

Registration: Formal recording of a treaty with an international organization where required or provided for.

Treaty Party: A state or other entity that has consented to be bound by a treaty and for which the treaty is in force.

Signatory: A state that has signed a treaty but has not necessarily completed the process required for it to become legally bound.

Reservations

Reservation: A unilateral statement made by a state when signing, ratifying, accepting, approving or acceding to a treaty, seeking to exclude or modify the legal effect of certain provisions as applied to that state.

Objection to a Reservation: A state’s formal response opposing another state’s reservation.

Compatibility of Reservation: The requirement in applicable treaty law that a reservation not be impermissible under the treaty or incompatible with its object and purpose where that standard applies.

Treaty Interpretation

Treaty Interpretation: The process of determining the meaning and scope of treaty provisions.

Important interpretive considerations include:

• Ordinary meaning of the terms
• Context
• Object and purpose
• Subsequent agreements
• Subsequent practice
• Relevant rules of international law

Object and Purpose: The fundamental aims and functions of a treaty.

Authentic Text: A treaty text recognized as authoritative.

Treaty Performance

Pacta Sunt Servanda: Treaties in force must be performed in good faith.

Treaty Compliance: Performance by treaty parties consistent with their treaty obligations.

Implementation: Measures adopted to give practical effect to treaty obligations.

Domestic Implementation: Measures taken within a state to implement international treaty commitments.

Amendment and Modification

Amendment: Formal alteration of a treaty according to applicable procedures.

Modification: A change in treaty obligations among certain parties where international law permits such modification.

Supplementary Protocol: An additional instrument establishing further obligations or procedures.

Termination and Withdrawal

Termination: Ending the legal operation of a treaty according to applicable international law.

Withdrawal: A state’s departure from a treaty where withdrawal is permitted.

Denunciation: Formal notification by a state of its intention to withdraw from a treaty.

Suspension: Temporary cessation of the operation of a treaty or certain treaty obligations.

Material Breach: A serious violation of a treaty that may have specified legal consequences under treaty law.

Bilateral and Multilateral Treaties

Bilateral Treaty: A treaty between two parties.

Multilateral Treaty: A treaty involving multiple parties.

Open Treaty: A treaty that allows additional states to become parties under specified conditions.

Closed Treaty: A treaty whose participation is restricted according to its terms.

Framework Convention: A treaty establishing broad principles and institutional arrangements while leaving detailed obligations to subsequent instruments.

Key Distinctions

Signature vs Ratification: Signature may authenticate or express preliminary consent; ratification is a subsequent formal act by which a state confirms consent to be bound when the treaty requires it.

Ratification vs Accession: Ratification normally follows signature; accession allows a state to become a party without having signed during the original signing period.

Treaty vs Convention: A convention is generally a type of international agreement; treaty is a broader legal term.

Reservation vs Objection: A reservation seeks to modify or exclude the legal effect of provisions; an objection challenges another state’s reservation.

Termination vs Suspension: Termination ends treaty operation; suspension temporarily stops operation under applicable rules.

Major Treaty Categories

International treaties may address:

• Peace and security
• Human rights
• International humanitarian law
• Trade
• Investment
• Environment
• Arms control
• Nuclear non-proliferation
• Maritime affairs
• Aviation
• Diplomatic relations
• International organizations

Key Terms at a Glance

Treaty | Convention | Covenant | Charter | Protocol | Pact | Accord | Negotiation | Adoption | Signature | Ratification | Acceptance | Approval | Accession | Entry Into Force | Depositary | Reservation | Objection | Interpretation | Pacta Sunt Servanda | Amendment | Modification | Termination | Withdrawal | Denunciation | Suspension | Material Breach

Related Glossaries

International Law | International Organizations | International Humanitarian Law | International Security | International Trade | Nuclear Non-Proliferation