In Wallis Trading Inc v Air Tanzania Company Ltd & Anor  EWHC 339 (Comm), at stake is a claim by Wallis Trading, a Liberian company which carried on the business of acquiring and leasing aircraft, against Air Tanzania and the Government of Tanzania in respect of sums which Wallis says are due to it from the Defendants arising out of a lease of an aircraft by Wallis to ATCL.
Of interest to the blog is the discussion of the Rome Convention at 74 ff. Defendants contend that the Lease is invalid, and ‘null and void’ because it was entered into in breach of the Procurement Legislation. Butcher J holds that the Lease expressly provided that English law was to be its governing law. The putative law of the lease therefore is English law (the bootstrap of Article 8 Rome Convention, now Article 10 Rome I. The Procurement Legislation is not part of English law, and non-compliance with it does not, as a matter of English law, render the Lease invalid, null or void.
What however about the application of A7 Rome Convention’s rule on lois de police /mandatory law?
1. When applying under this Convention the law of a country, effect may be given to the mandatory rules of the law of another country with which the situation has a close connection, if and in so far as, under the law of the latter country, those rules must be applied whatever the law applicable to the contract. In considering whether to give effect to these mandatory rules, regard shall be had to their nature and purpose and to the consequences of their application or non-application.
2. Nothing in this Convention shall restrict the application of the rules of the law of the forum in a situation where they are mandatory irrespective of the law otherwise applicable to the contract]
Here, Butcher J points out that Article 7(1) of the Rome Convention does not have the force of law in the United Kingdom: the UK had entered an Article 22 reservation viz the lois de police rule. The impossibility of same viz Rome I led to the stricter language in Article 9. In the event of Rome I not being part of the future relations between the UK and the EU, the Convention and its reservation will once again be applicable.
(Handbook of) European Private International Law, 2nd ed. 2016, Chapter 3, Heading 3.2.8, Heading 18.104.22.168.