Withdrawal from Treaties

Withdrawal from Treaties refers to the process by which a State ceases to be bound by a treaty while the treaty may continue to exist for the other parties. Withdrawal is particularly important in multilateral treaties, where one State may leave the treaty relationship without necessarily bringing the entire treaty to an end.

The principal rules are contained in Articles 54–56 of the Vienna Convention on the Law of Treaties, 1969 (VCLT), along with the procedural rules in Article 65.

Meaning of Withdrawal

Withdrawal means the unilateral departure of a State from a treaty relationship in accordance with the treaty or applicable International Law.

The distinction is:

Withdrawal → one State leaves

Termination → treaty itself comes to an end

Therefore, withdrawal from a multilateral treaty does not necessarily terminate the treaty for the remaining parties.

Withdrawal by Consent

Under Article 54 VCLT, a State may withdraw from a treaty:

• in conformity with the provisions of the treaty; or
• at any time with the consent of all the parties, after consultation with the other contracting States.

Where the treaty expressly provides a withdrawal mechanism, the State must follow that mechanism.

Withdrawal According to Treaty Provisions

Many treaties expressly provide:

• whether withdrawal is permitted;
• when withdrawal can occur;
• notice requirements;
• the authority to whom notice must be given;
• when withdrawal becomes effective.

For example:

Treaty

↓

Withdrawal clause

↓

State gives required notice

↓

Notice period expires

↓

Withdrawal becomes effective

The treaty continues to operate among the remaining parties unless its terms provide otherwise.

Withdrawal When Treaty Is Silent

The most important rule is contained in Article 56 VCLT.

Where a treaty contains no provision regarding termination and does not provide for withdrawal, a State generally cannot unilaterally withdraw from it.

However, withdrawal may be possible where:

• it is established that the parties intended to admit the possibility of withdrawal; or
• a right of withdrawal may be implied by the nature of the treaty.

This is a narrow exception.

Article 56: Notice Requirement

Where withdrawal is permitted under Article 56, a State must ordinarily give at least twelve months’ notice of its intention to withdraw.

Thus:

Withdrawal permitted

↓

Notice given

↓

Normally 12 months’ notice

↓

Withdrawal becomes effective

subject to the applicable treaty and circumstances.

Withdrawal and State Consent

Withdrawal reflects the principle of State sovereignty, but it is not an unrestricted right.

A State is generally required to establish a legal basis for withdrawal.

Therefore:

Treaty obligation

↓

State wishes to withdraw

↓

Treaty provision / consent / Article 56 basis

↓

Valid withdrawal

A State cannot simply declare itself free from a treaty whenever it chooses.

Withdrawal from Bilateral Treaties

Withdrawal is more commonly discussed in relation to multilateral treaties.

In a bilateral treaty, withdrawal by one State will generally bring the treaty relationship between the two States to an end, subject to the treaty’s terms and applicable International Law.

In a multilateral treaty:

State A withdraws

↓

State B + C + D remain parties

↓

Treaty continues among remaining parties

unless the treaty provides otherwise.

Withdrawal vs Termination

Withdrawal	Termination
Usually concerns one State leaving	Concerns ending the treaty or its operation
Particularly relevant to multilateral treaties	May affect all parties
Treaty may continue for remaining parties	Treaty relationship comes to an end
Governed by treaty provisions or applicable rules	Governed by Articles 54–64 VCLT
Article 56 is especially important	Article 54 onwards

Withdrawal vs Suspension

Withdrawal	Suspension
State ceases to be bound according to applicable rules	Treaty obligations temporarily cease operating
Generally permanent departure	Generally temporary
State leaves treaty relationship	State remains connected to treaty
Article 56	Articles 57–60

Withdrawal vs Denunciation

Denunciation is often used to describe a State’s formal declaration that it intends to leave a treaty.

In treaty practice, the terms withdrawal and denunciation may be used interchangeably depending upon the treaty.

The precise legal effect depends upon the relevant treaty provisions.

Withdrawal and Ratification

A State first becomes bound through a recognised method such as:

• ratification;
• acceptance;
• approval;
• accession;
• signature where signature itself constitutes consent.

Once bound, withdrawal may subsequently occur where permitted.

Therefore:

Consent to be bound

↓

Treaty enters into force

↓

State becomes party

↓

Withdrawal according to applicable rules

Withdrawal and Reservations

Withdrawal should be distinguished from a reservation.

Reservation

Seeks to exclude or modify the legal effect of particular treaty provisions.

Withdrawal

Seeks to end the State’s participation in the treaty.

Therefore:

Reservation → limited modification

Withdrawal → departure from treaty

Withdrawal and Pacta Sunt Servanda

The principle of pacta sunt servanda, contained in Article 26 VCLT, requires treaties in force to be performed in good faith.

Withdrawal is consistent with pacta sunt servanda where it is exercised in accordance with the treaty or applicable International Law.

A State cannot use withdrawal as a substitute for lawful termination procedures.

Withdrawal and Fundamental Change of Circumstances

A State may, in exceptional circumstances, seek to invoke Article 62 VCLT concerning a fundamental change of circumstances.

Where Article 62 permits it, the State may invoke the change as a ground for:

• terminating the treaty;
• withdrawing from it; or
• suspending its operation,

depending upon the circumstances.

The requirements are strict.

Withdrawal and Material Breach

A material breach under Article 60 VCLT may provide a basis for another State to invoke treaty termination or suspension.

In multilateral treaties, the consequences are more complex and depend upon the circumstances and the VCLT requirements.

Withdrawal should therefore not be confused with the separate doctrine of termination or suspension following material breach.

Withdrawal and Impossibility of Performance

Under Article 61 VCLT, supervening impossibility of performance may, in limited circumstances, provide a basis for:

• terminating a treaty;
• withdrawing from it; or
• suspending its operation.

The impossibility must generally result from the permanent disappearance or destruction of an object indispensable for the execution of the treaty.

Procedure for Withdrawal

The procedural requirements are primarily governed by Article 65 VCLT.

A State invoking a ground for withdrawal generally must:

Notify other parties

↓

Specify the proposed measure

↓

State the reason

↓

Allow other parties an opportunity to respond

↓

Seek a solution if an objection arises

This protects other treaty parties from sudden or legally unsupported withdrawal.

Notification of Withdrawal

The State’s notification should clearly indicate:

• its intention to withdraw;
• the treaty concerned;
• the legal basis for withdrawal where necessary;
• the proposed effective date.

The treaty itself may prescribe additional requirements.

Effect of Withdrawal

Under Article 70 VCLT, unless the treaty or parties provide otherwise, withdrawal releases the withdrawing State from any further obligation to perform the treaty.

However, it does not generally affect rights, obligations or legal situations created through the execution of the treaty before the withdrawal became effective.

Therefore:

Withdrawal

↓

Future treaty obligations cease

but:

Past legal consequences generally remain

Withdrawal Does Not Erase Past Obligations

A State cannot ordinarily use withdrawal to erase obligations that arose while it was a party.

For example:

State bound from 2020–2026

↓

Valid withdrawal in 2026

↓

Future obligations end according to applicable rules

↓

Rights and obligations already created before withdrawal are not automatically erased

Withdrawal from Human Rights Treaties

Withdrawal from human-rights treaties may raise particular legal questions concerning:

• continuing obligations;
• rights accrued before withdrawal;
• pending proceedings;
• jurisdiction;
• protection of individuals.

The consequences depend upon the particular treaty and applicable International Law.

Withdrawal from Constitutive Treaties

Withdrawal from treaties establishing international organisations may involve special consequences.

The treaty may contain provisions dealing with:

• withdrawal;
• membership;
• financial obligations;
• continuing responsibilities;
• institutional consequences.

The organisation’s constituent instrument must therefore be examined carefully.

Withdrawal and Multilateral Treaties

Withdrawal is particularly significant in multilateral treaty regimes.

The basic structure is:

A + B + C + D + E

↓

State E withdraws

↓

A + B + C + D remain parties

↓

Treaty continues among remaining parties

unless the treaty provides otherwise.

Article 55 and Withdrawal

Article 55 VCLT provides that a multilateral treaty does not terminate merely because the number of parties falls below the number necessary for its entry into force, unless the treaty provides otherwise.

This is important because the withdrawal of one or more States does not automatically terminate a multilateral treaty.

Article 56 and Unilateral Withdrawal

Article 56 is particularly important for examination purposes.

The rule can be remembered as:

Treaty silent on withdrawal

↓

No automatic right to withdraw

↓

Unless intention to permit withdrawal is established

OR

Right can be implied from nature of treaty

↓

At least 12 months’ notice

Examples of Withdrawal Clauses

A treaty may provide:

A party may withdraw by giving written notice to the depositary.

The treaty may additionally specify:

• notice period;
• effective date;
• continuing obligations;
• consequences of withdrawal.

Where such a clause exists, the State follows the treaty rather than relying on Article 56.

Important VCLT Provisions

Article	Subject
Article 26	Pacta sunt servanda
Article 54	Termination or withdrawal by consent
Article 55	Reduction in number of parties
Article 56	Withdrawal from treaty containing no provision
Article 60	Material breach
Article 61	Impossibility of performance
Article 62	Fundamental change of circumstances
Article 65	Procedure concerning withdrawal
Article 70	Consequences of termination and withdrawal

Important Case

Fisheries Jurisdiction, 1973

The ICJ considered issues concerning treaty commitments and unilateral attempts to alter international obligations. The case illustrates the broader principle that States must rely upon recognised legal rules when seeking to alter or escape international commitments.

Withdrawal Flowchart

State is party to treaty

↓

Wants to withdraw

↓

Does treaty contain withdrawal clause?

Yes

↓

Follow treaty procedure

No

↓

Apply Article 56

↓

Was withdrawal intended by parties?

OR

Can withdrawal be implied by nature of treaty?

↓

Yes

↓

Give required notice

↓

Withdrawal becomes effective

↓

Article 70 consequences apply

Quick Revision

• Withdrawal → departure of a State from a treaty relationship.
• Particularly important for multilateral treaties.
• Article 54 → withdrawal according to treaty provisions or consent of all parties.
• Article 56 → withdrawal where treaty contains no withdrawal provision.
• Article 56 creates a presumption against unilateral withdrawal where the treaty is silent.
• Withdrawal may nevertheless be possible if:
  • parties intended to permit it; or
  • a right can be implied from the nature of the treaty.
• At least 12 months’ notice is generally required under Article 56.
• Article 65 → procedural requirements.
• Article 70 → consequences of withdrawal.
• Withdrawal generally ends future treaty obligations for the withdrawing State.
• Withdrawal does not automatically erase rights or obligations created before withdrawal.
• Withdrawal ≠ termination.
• Withdrawal ≠ suspension.
• Withdrawal ≠ reservation.
• Article 62 may permit withdrawal in exceptional circumstances involving fundamental change of circumstances.
• Article 61 may be relevant where performance becomes permanently impossible.
• Article 55 → reduction in number of parties does not automatically terminate a multilateral treaty.
• The key principle is:

A State may withdraw from a treaty only where the treaty or applicable International Law provides a legal basis for withdrawal.

Conclusion

Withdrawal from Treaties refers to the process by which a State ceases to be bound by a treaty while the treaty may continue to operate among the remaining parties. Withdrawal is particularly significant in the context of multilateral treaties. Under Article 54 of the Vienna Convention on the Law of Treaties, 1969, withdrawal may occur in conformity with the treaty’s provisions or with the consent of all parties. Where a treaty contains no provision concerning withdrawal and does not otherwise provide for it, Article 56 establishes a general presumption against unilateral withdrawal. Withdrawal may nevertheless be possible where it is established that the parties intended to permit it or where a right of withdrawal may be implied by the nature of the treaty. In such circumstances, the State must ordinarily provide at least twelve months’ notice. The procedure for invoking withdrawal is governed by Article 65, while Article 70 deals with its consequences. Withdrawal generally releases the State from future obligations under the treaty but does not automatically affect rights, obligations or legal situations created through prior performance. Withdrawal must be distinguished from termination, suspension and invalidity: withdrawal ordinarily concerns the departure of a particular State, whereas termination concerns the ending of the treaty or its operation, suspension temporarily interrupts operation, and invalidity concerns a defect affecting the treaty’s legal validity. The principle of pacta sunt servanda remains relevant because a State cannot simply disregard treaty obligations without a recognised legal basis for withdrawal. Ultimately, the law of withdrawal seeks to balance State sovereignty and treaty stability, permitting States to leave treaty regimes where a valid legal basis exists while preventing unilateral escape from international commitments.