Sui generis
A similar case that led to the use of the label "sui generis" is the relationship of New Caledonia relative to France, because the legal status of New Caledonia can aptly be said to lie somewhere between a French overseas collectivity and a sovereign nation. Although other examples of such status for other dependent or disputed territories may exist, this arrangement is unique within the French realm.
Sui generis
The grant of private hire vehicle (taxicab) operators licences by local authorities frequently has a condition attached that the appropriate "sui generis" change of use planning permission is granted to those premises to ensure those businesses cannot trade lawfully without the appropriate planning consents.