I don't know where in the treaty of Lisbon it says so, but I've checked and common law marriage isn't a thing in France
also France already had registered partnerships / civil unions available (its called PACS) for same sex couples way before the treaty of lisbon was a thing. So they were already in compliance.
Is common law recognized in France?
The French Parliament passed a new law - giving legal status to unmarried couples, including homosexual unions. ... The law allows couples, of the same sex or not, to enter into a union and be entitled to the same rights as married couples in such areas as income tax, inheritance, housing and social welfare.
As per EU law …
I care NOT .. fact is … the directors of the farmhouse
Should
What defines cohabitation? Cohaitation is defined by a law dated on 1999 as a Union characterized by a common life with a character of stability and continuity, between two persons are living in couples.
If you live in a country where you cannot get married, you cannot enter into a registered partnership, or if you choose not to do either, you could set up a cohabitation contract with your partner and settle practical or legal aspects of your cohabitation.
In practice, however, even with such a cohabitation contract it may still be difficult for you to enforce your rights. If conflicts about property arise, the law of the country where the conflict occurred will generally apply.
Except for the cheese. 
or does he....
