Intra-EU mobility
Article 27
1. A third-country national who holds a valid authorisation issued by the first Member State for the purpose of studies in the framework of a Union or multilateral programme that comprises mobility measures or of an agreement between two or more higher education institutions, or for the purpose of research may enter and stay in order to carry out part of the studies or research in one or several second Member States on the basis of that authorisation and a valid travel document under the conditions laid down in Articles 28, 29 and 31 and subject to Article 32. 2. During the mobility referred to in paragraph 1, researchers may, in addition to research activities, teach and students may, in addition to their studies, work, in one or several second Member States in accordance with the conditions laid down in Articles 23 and 24 respectively. 3. When a researcher moves to a second Member State in accordance with Article 28 or 29, family members holding a residence permit issued in accordance with Article 26 shall be authorised to accompany the researcher in the framework of the researcher's mobility under the conditions laid down in Article 30.