Simple English definitions for legal terms
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Rebus sic stantibus: This is a rule that says if things change a lot, a treaty might not be valid anymore. It's an old rule that's been used for a long time. Sometimes, this rule is written into a treaty so that everyone knows what might happen if things change too much.
Definition: Rebus sic stantibus is a legal principle that allows for the unenforceability of a treaty or agreement due to significant changes in circumstances. This principle is often included as a clause in international agreements and treaties.
Example: Imagine two countries sign a treaty to share water resources from a river. However, due to a severe drought, the river dries up, making it impossible to fulfill the terms of the treaty. In this case, the principle of rebus sic stantibus could be invoked to renegotiate or terminate the treaty.
The principle of rebus sic stantibus is one of the oldest norms of customary international law and is recognized by the Vienna Convention on the Law of Treaties. It allows for flexibility in international agreements and recognizes that unforeseen circumstances can make it impossible to fulfill the terms of a treaty.