1.A person who normally pursues an activity as an employed person in two or more Member States shall be subject to:
(a)the legislation of the Member State of residence if he pursues a substantial part of his activity in that Member State or if he is employed by various undertakings or various employers whose registered office or place of business is in different Member States, or
(b)the legislation of the Member State in which the registered office or place of business of the undertaking or employer employing him is situated, if he does not pursue a substantial part of his activities in the Member State of residence.
2.A person who normally pursues an activity as a self-employed person in two or more Member States shall be subject to:
(a)the legislation of the Member State of residence if he pursues a substantial part of his activity in that Member State; or
(b)the legislation of the Member State in which the centre of interest of his activities is situated, if he does not reside in one of the Member States in which he pursues a substantial part of his activity.
3.A person who normally pursues an activity as an employed person and an activity as a self-employed person in different Member States shall be subject to the legislation of the Member State in which he pursues an activity as an employed person or, if he pursues such an activity in two or more Member States, to the legislation determined in accordance with paragraph 1.
4.A person who is employed as a civil servant by one Member State and who pursues an activity as an employed person and/or as a self-employed person in one or more other Member States shall be subject to the legislation of the Member State to which the administration employing him is subject.
5.Persons referred to in paragraphs 1 to 4 shall be treated, for the purposes of the legislation determined in accordance with these provisions, as though they were pursuing all their activities as employed or self-employed persons and were receiving all their income in the Member State concerned.