Parliament of the United Kingdom, Immigration Act 1971 (1971)
“ The owners or agents of a ship or aircraft employed to carry passengers for reward shall not, without the approval of the Secretary of State, arrange for the ship or aircraft to call at a port in the United Kingdom other than a port of entry for the purpose of disembarking passengers, if any of the passengers on board may not enter the United Kingdom without leave and have not been given leave, or for the purpose of embarking passengers unless the owners or agents have reasonable cause to believe all of them to be patrial. ”
