Introduction
When the agreement concerns the successions of several people, any governing laws that have already been identified must be adapted, because if the persons in question should live in two different States, a distributive application of each of the two laws will therefore be required. And if these laws take different views of agreements as to succession (with one validating them, the other cancelling them), we may end up at a dead end.
Therefore, Article 25(2)[1] requires us to proceed in two steps when the agreement concerns the successions of more than one person. It makes a distinction between the admissibility and the validity of the agreement. Such an approach is not necessary, however, if the parties to the agreement do not make a choice of law.