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 iuris
The Latin sui iuris (the individual words meaning 'self' and ('law) corresponds to the Greek 'αυτονόμος', from which the English word autonomy is derived.