4 Can or must the matrimonial property regime be registered?
There is no register of matrimonial property or register of marriage contracts in France.
4.5. Can a matrimonial contract concluded in a foreign state according to foreign law be registered in your country? If yes, under which conditions or formalities?
[This information is valuable in respect of third parties, see art. 28 of the European Regulation (EU) 2016/1103 of 24 June 2016. When a matrimonial contract is registered in your country it can be invoked against third parties. An interconnection of matrimonial property registers in Europe is not existing and therefor the registration of the matrimonial contract must be undertaken in all countries separately, where the spouses have property or conclude contracts. Only then the spouses can invoke their matrimonial contract against third parties in that country.]