Bringslite of Oz
Territory declarations are partly ways to explain exactly how to start a war with the polity making the declaration. Such a war has a clear end condition- either the intruder stops intruding or the claimant vacates a portion of their claim.
That is the ultimate end case scenario in strongly enforced cases, I suppose.
De facto vacates the claim. Since there isn't a legislative or judicial body accepted by the entire River Kingdoms, there are no rules de jure.