It is to concordats in this later sense that this article refers.
It is for this reason that concordats always present a clearly marked character of mutual concession, each of the two powers renouncing certain of its claims in the interests of peace.
The shades which distinguish these three forms are not without significance, but they in no way detract from the contractual character of concordats.
Since concordats are contracts they give rise to that special mutual obligation which results from every agreement freely entered into; for a contract is binding on both parties to it.
Concordats are undoubtedly conventions of a particular nature.