[Jan H. Dalhuisen is Professor at King’s College in London, the Miranda Chair of Transnational Financial Law at the Catholic University in Lisbon, and is Visiting Professor at UC Berkeley]
Professor Dalhuisen is guest-blogging with us this week on the transnationalization of private law. Links to his other posts can be found under "Related Posts" below.
It was submitted that the essence of the transnationalization of private law is the consideration of different sources of law. They may conflict. This would suggest a need for a hierarchy, a problem that also surfaces in foreign investment law. In the
lex mercatoria we may further find (as in foreign investment law), however, that the law, in as far as we have it, is still insufficiently complete or underdeveloped at the transnational level. When no clear transnational legal regime emerges, we are therefore still relegated to a domestic law as the default rule, in private law found on the basis of the ordinary conflict rules.
To me that is fully acceptable and makes for a complete system for those who still think in those terms, but there are two observations to make. First, the room for the transnational sources will progressively expand and in international transactions the bias must be in their favour. Second, even where domestic law applies in international cases as the subsidiary or default rule, it becomes part of the transnational law or modern
lex mercatoria and must fulfil its place therein. In other words, if it does not make any sense or does not serve justified needs it will be adapted. It leads to the important conclusion that the application of English law in international cases is not the same as the application of English law in domestic cases. That then goes for all domestic laws.
In truth and upon a more proper analysis (and perhaps unknown to themselves), this is the way international arbitrators now increasingly operate in finding the applicable law and it is at the heart of the modern notion of the
lex mercatoria. Arbitrators will apply fundamental principles first, then mandatory custom and practices, then mandatory treaty law to the extent existing, then mandatory general principles, then party autonomy, subsequently directory rules of custom, treaty law and general principles, and finally, if all fails, domestic private law. A choice of a domestic law by the parties moves it up from the residual level or default level to the level of party autonomy but no higher and fundamental transnational principles, mandatory custom, treaty law and general principle still prevail over it. Again this chosen local law would function in the transnational legal order and be adapted accordingly in its
lex mercatoria. A choice of a domestic law by the parties in international transactions covers therefore much less ground than people often think and operates differently as I explained in my contribution for the
Liber Amicorum for Lord Bingham.