Within four weeks of the lifting of border control at internal borders, the Member State which has carried out border control at internal borders shall present a report to the European Parliament, the Council and the Commission on the reintroduction of border control at internal borders, outlining, in particular, the initial assessment and the respect of the criteria referred to in Articles 26, 28 and 30, the operation of the checks, the practical cooperation with neighbouring Member States, the resulting impact on the free movement of persons, the effectiveness of the reintroduction of border control at internal borders, including an ex-post assessment of the proportionality of the reintroduction of border control.
The Commission may issue an opinion on that ex-post assessment of the temporary reintroduction of border control at one or more internal borders or at parts thereof.
The Commission shall present to the European Parliament and to the Council, at least annually, a report on the functioning of the area without internal border control. The report shall include a list of all decisions to reintroduce border control at internal borders taken during the relevant year.