Article 46 TFEU

The European Parliament and the Council shall, acting in accordance with the ordinary legislative procedure and after consulting the Economic and Social Committee, issue directives or make regulations setting out the measures required to bring about freedom of movement for workers, as defined in Article 45, in particular:
(a) by ensuring close cooperation between national employment services;
(b) by abolishing those administrative procedures and practices and those qualifying periods in respect of eligibility for available employment, whether resulting from national legislation or from agreements previously concluded between Member States, the maintenance of which would form an obstacle to liberalisation of the movement of workers;
(c) by abolishing all such qualifying periods and other restrictions provided for either under national legislation or under agreements previously concluded between Member States as imposed on workers of other Member States conditions regarding the free choice of employment other than those imposed on workers of the State concerned;
(d) by setting up appropriate machinery to bring offers of employment into touch with applications for employment and to facilitate the achievement of a balance between supply and demand in the employment market in such a way as to avoid serious threats to the standard of living and level of employment in the various regions and industries.