Browsing through dozens of articles about Princess Charlene of Monaco, who has just announced that she is carrying twins, I saw there was a lot of confusion about which one would become Prince of Monaco, taking over after Albert steps down or dies. (Of course this could happen in an untimely fashion, in which case it's possible that his sister Caroline would step in.)
I found the definitive article!
CONSTITUTIONCENTER.ORG MONACOS TWIN SUCCESSION
EXCERPT:
If the twins are both boys, the first child born becomes the heir to the throne, with his twin brother as heir presumptive.
If the twins are a boy and a girl, the boy becomes heir, regardless of if he is born first or second. His sister is heir presumptive unless her parents have another child who is a boy in the future.
If the twins are both girls, the first child born becomes the heir to the throne, with his twin sister as heir presumptive – unless or until another boy comes along. Then the younger boy becomes the heir to the throne.
