International law — Relation to municipal law — Treaties — Franco — Italian Agreement containing most — favoured — nation clause — Need for publication in Journal officiel — The law of France.

Treaties — Conclusion and operation of — Necessity for municipal legislation — Franco — Italian Agreement containing most — favourednation clause — Whether treaty enforceable in France with retroactive effect before publication in Journol officiel — The law of France.

Treaties — Special kinds of — Most-favoured-nation clause — Franco–Italian Convention on Establishment, 1951 — Whether clause had retroactive effect to benefit of Italians working in France — The law of France.