Article 156 TFEU

With a view to achieving the objectives of Article 151 and without prejudice to the other provisions of the Treaties, the Commission shall encourage cooperation between the Member States and facilitate the coordination of their action in all social policy fields under this Chapter, particularly in matters relating to:
— employment,
— labour law and working conditions,
— basic and advanced vocational training,
— social security,
— prevention of occupational accidents and diseases,
— occupational hygiene,
— the right of association and collective bargaining between employers and workers.

To this end, the Commission shall act in close contact with Member States by making studies, delivering opinions and arranging consultations both on problems arising at national level and on those of concern to international organisations, in particular initiatives aiming at the establishment of guidelines and indicators, the organisation of exchange of best practice, and the preparation of the necessary elements for periodic monitoring and evaluation. The European Parliament shall be kept fully informed.

Before delivering the opinions provided for in this Article, the Commission shall consult the Economic and Social Committee.