6/9/19 Rebus sic stantibus
 
[Latin: matters so standing; in the existing state of matters]
A phrase used when a state or international organization seeks to avoid or renegotiate its treaty obligations because a change of circumstances has rendered the objective of the treaty difficult or impossible. The Vienna Convention on the Law of Treaties 1969 distinguishes between supervening impossibility of performance and fundamental change of circumstances (Articles 61 and 62).