Free movement of persons' rights can be seen as a tiered level of packages rotating around the fundamental concept of the worker. Rights and obligations arise out of the basic need to ensure the free movement of one of the main factors of production in the community. Illustrate this statement with case law and an analysis of the main regulation in this field. In what areas does the link with the 'worker' concept no longer need to be so strong?
             Freedom of movement for persons and the abolition of controls at internal frontiers forms part of a wider concept, that of the internal market, in which it is not possible for internal frontiers to exist or for individuals to be hampered in their movements. The concept of the free movement of persons has changed in meaning since its inception. The first provisions on the subject referred merely to the free movement of individuals considered as economic agents, either as employees or providers of services. The original economic concept has gradually widened to take on a more general meaning connected with the idea of Union citizenship, independent of any economic activity or distinctions of nationality.
             Article 2: The Union shall set itself the following objectives (...)to maintain and develop the Union as an area of freedom, security and justice, in which the free movement of persons is assured in conjunction with appropriate measures with respect to external border controls, asylum, immigration and the prevention and combating of crime,
             Article 14 ECT: Establishing the internal market including the free movement of persons.
             The internal market shall comprise an area without internal frontiers in which the free movement of goods, persons, services and capital is ensured in accordance with the provisions of this Treaty.
             Article 18 ECT: Union citizens have the right to move and reside freely within the territory of the Member States.
             Every citizen of the Union shall have the right t...