Kurt Siehr (formerly MPI Hamburg) has posted Mandatory Rules of Third States: from Ole Lando to Contemporary European Private International Law on SSRN.
The abstract reads:
On 18 October 2016 the European Court of Justice, in the case Greece v. Nikiforidis, decided: ‘Article 9 (3) of the Regulation No. 503/2008 on the law applicable to contractual obligations must be interpreted as precluding overriding mandatory provisions other than those of the State of the forum or of the State where the obligations arising out of the contract have to be or have been performed from being applied, as legal rules, by the court of the forum, but as not precluding it from taking such other overriding mandatory provisions into account as matters of fact in so far as this is provided for by the national law that is applicable to the contract pursuant to the regulation’. Ole Lando already anticipated this development when he dealt with this problem arising under the Rome Convention of 1980 on the law applicable to contractual obligations still in force in Denmark.
The paper was published in the European Review of Private Law 2020.