The Channel Tunnel (Miscellaneous Provisions) Order 1994

Article 15

(1) Officers of the other States shall be permitted freely to transfer to their own States sums of money levied on behalf of their Governments in the control zone situated in the host State, as well as merchandise and other goods seized there.

(2) They may equally sell such merchandise and other goods in the host State in conformity with the provisions in force in the host State and transfer the proceeds to their own State.