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Reference.org
Internal border control
open-in-new
<p> Controls imposed on internal borders within a single state or territory include measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime <a href="/facts/Border/82NnNLR0">borders</a> through <a href="/facts/Border_controls/ngScQKAz">border controls</a>. </p>