Court of Justice 26 November 1998, C-178/97 (Barry Banks and Others v Theatre royal de la Monnaie.)

Opinion of the Advocate-General Opinion of the Advocate-General 1. May an opera singer or a conductor of an orchestra who normally pursues his occupation in a Member State under whose social security legislation his activity is regarded as being that of a self-employed person, and who moves to the territory of another Member State after having been engaged to appear for a few days in a theatrical