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.
Planning use classes in England
Not every use of building is assigned a Class under this legislation. Examples of these include theatres, scrap yards, petrol stations, nightclubs, and casinos, and these are known as "sui generis" uses.