No one party to a treaty can impose its particular interpretation of the treaty upon the other parties. Consent may be implied, however, if the other parties fail to explicitly disavow that initially unilateral interpretation, particularly if that state has acted upon its view of the treaty without complaint. Consent by all parties to the treaty to a particular interpretation has the legal effect of adding another clause to the treaty – this is commonly called an 'authentic interpretation'.
The legal effect of adding another clause to a treaty that occurs when all parties to a treaty consent to a particular interpretation of the treaty is commonly known as what?
an 'authentic interpretation'