The treaties define Monaco's independent status and sovereignty, as well as the rights of succession of the princely House of Grimaldi.
Pressure was brought to bear on the Monégasques to ratify treaty provisions which would empower France to prevent such an occurrence.
[2] Article 2 of the treaty stipulated that foreign policy measures concerning Monaco must be agreed upon by the French and Monégasque governments.
Under those constitutional revisions, approved by the 2002 treaty, although only a born member of the Grimaldi line may now wear the Crown, Monaco assumes the unilateral prerogative to alter the order of succession and the principality's independence is explicitly secured.
This resolved Monégasque concerns that under the 1918 treaty dynastic acts affecting the succession (such as marriage or adoption within the reigning House of Grimaldi) required French assent, yet if a vacancy on the throne occurred, Monaco would have automatically become a French protectorate.