Non-retroactivity of treaties Unless a different intention appears from the treaty or is otherwise established, its provisions do not bind a party in relation to any act or fact which took place or any situation which ceased to exist before the date of the entry into force of the treaty with respect to that party.
Official text
Transcription: Machine-parsed
In force from 23-05-1969
Source page 11
Section 28 of the Vienna Convention on the Law of Treaties/akn/un/act/treaty/1969-05-23/vclt
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