The Requirement to Verify the Principle of Subsidiarity Legal Acts of the European Union

The principle of subsidiarity is a principle of regulation of the exercise of Union powers, which allows each institution in the exercise of its powers to ensure that the principle of subsidiarity is respected. The principle is evolving taking into account the fact that the Single European Act (1987) provided for as a criterion, not a principle, for the Treaty of Lisbon to regulate the principle in art. 5 para. 3 of the TEU, adding an explicit reference to the regional and local dimension of the principle of subsidiarity.