8 judgesM. Zuleeg, J. L. Murray (Presidents of Chambers), G. F. Mancini, F. A. Schockweiler, J. C. Moitinho de Almeida, F. Grévisse, M. Diez de Velasco, P. J. G. Kapteyn
25In order to determine the place of performance, which is a matter for the national court, it is necessary to take account of the fact that, in this case, the work entrusted to the employee was carried out from an office in a Contracting State, where the employee had established his residence, from which he performed his work and to which he returned after each business trip. Furthermore, it is open to the national court to take account of the fact that, when the dispute before it arose, the employee was carrying out his work solely in the territory of that Contracting State. In the absence of other determining factors, that place must be deemed, for the purposes of Article 5(1) of the Convention, to be the place of performance of the obligation on which a claim relating to a contract of employment is based.