- According to art. 162 of the TFEU, the European Social Fund:   Aims to render the employment of workers easier and to increase their geographical and occupational mobility within the Union, and to facilitate their adaptation to industrial changes and to changes in production systems, in particular through vocational training and retraining.

- According to the TFEU, in which of the following main areas does the European Union have shared competence with those of Member States?   Social policy, for the aspects defined in the TFEU.

- An administrative act is null and void:   If one of the essential elements of the act is missing.