Recital 21
Schengen Borders Code
(21) In an area where persons may move freely, the reintroduction of border control at internal borders should remain an exception. Border control should not be carried out or formalities imposed solely because such a border is crossed.
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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.