As mentioned, Article 7 can be used for temporary suspension. Especially during the debt crisis, the idea of invoking public international law has also gained in popularity. Article 60 of the Vienna Convention on the Law of Treaties:
A material breach of a multilateral treaty by one of the parties
entitles:
a) The other parties by unanimous agreement to suspend the operation
of the treaty in whole or in part or to terminate it either:
(i) In the relations between themselves and the defaulting State, or
(ii) As between all the parties;
Article 62:
- A fundamental change of circumstances which has occurred with regard to those existing at the time of the conclusion of a treaty,
and which was not foreseen by the parties, may not be invoked as a
ground for terminating or withdrawing from the treaty unless:
(a) The existence of those circumstances constituted an essential
basis of the consent of the parties to be bound by the treaty; and
(b) The effect of the change is radically to transform the extent of
obligations still to be performed under the treaty