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.
Humani generis redemptionem
Humani generis redemptionem is an encyclical by Pope Benedict XV given at St. Peter's, Rome, on 15 June, the Feast of the Sacred Heart of Jesus in the year 1917, in the third of his Pontificate. The encyclical points to an ever-increasing number of Christian preachers and an ever-decreasing effect of their preaching. He admonished bishops to be preachers first of all, and to be more careful in the selection of preachers and confessors, for whom Humani generis redemptionem prescribed basic preconditions.