2. The consent of an intemational organization to an agreement provided for m

paragraph 1 shall be govemed by the rules of that organization.

Article 40

Amendment of multilateral treaties

1. Unless the treaty otherwise provides, the amendment of multilateral treaties shall be

govemed by the following paragraphs.

2. Any proposal to amend a multilateral treaty as between all the parties must be notified

to all the contracting States and all the contracting organizations, each one of which

shall have the right to take part in:

a) the decision as to the action to be taken in regard to such proposal;

b) the negotiation and conclusion of any agreement for the amendment of the

treaty.

3. Every State or intemational organization entitled to become a party to the treaty shall

also be entitled to become a party to the treaty as amended.

4. The amending agreement does not bind any State or intemational organization already

a party to the treaty which does not become a party to the amending agreement; article

30, paragraph 4 (b), applies in relation to such State or Organizations.

5. Any State or intemational organization which becomes a party to the treaty after the

entry into force of the amending agreement shall, failing an expression of a different

intention by that State or that organization:

a) be considered as a party to the treaty as amended; and

b) be considered as a party to the unamended treaty in relation to any party to

the treaty not bound by the amending agreement.

Article 41

Agreements to modify multilateral treaties between certain of the parties only

1. Two or more of the parties to a multilateral treaty may conclude an agreement to

modify the treaty as between themselves alone if:

a) the possibility of such a modification is provided for by the treaty; or

b) the modification in question is not prohibited by the treaty and:

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