# The Channel Tunnel (International Arrangements) Order 1993, 

Extent: E+W+S+N.I.

(1) For through trains, each state may carry out its frontier controls during the journey and may authorise the officers of the other State to carry out their frontier controls in its territory.
(2) The two States may agree to an extension of the control zones for through trains, as far as London and Paris, respectively.

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Source: https://www.legislation.gov.uk/uksi/1993/1813/schedule/2/part/II/crossheading/3 (the official version)
Page: https://openlegislation.uk/channel-tunnel-international-arrangements-order-1993/schedule-2/part-II/crossheading-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.