Recital 23
(23) As free movement of persons is affected by the temporary reintroduction of internal border control, any decision to reintroduce such control should be taken in accordance with commonly agreed criteria and should be duly notified to the Commission or be recommended by a Union institution. In any case, the reintroduction of internal border control should remain an exception and should only be effected as a measure of last resort, for a strictly limited scope and period of time, based on specific objective criteria and on an assessment of its necessity which should be monitored at Union level. Where a serious threat to public policy or internal security requires immediate action, a Member State should be able to reintroduce border control at its internal borders for a period not exceeding ten days. Any prolongation of that period needs to be monitored at Union level.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-14 · Text as adopted (Official Journal); later amendments are not incorporated in this text.