# Anglo-Portuguese Commercial Treaty Act 1914, Part Article 12


Notwithstanding any thing in this treaty either of the contracting Parties reserves the right to confine to national vessels the trade between any ports within its territories. In the event of this right being exercised by either country, nothing in this treaty shall be construed as entitling the vessels of that country to participate in the corresponding trade between ports of the other country.
British and Portuguese vessels may nevertheless proceed from one port to another, either for the purpose of landing the whole or part of their passengers or cargoes brought from abroad, or of taking on board the whole or part of their passengers or cargoes for a foreign destination.
It is also understood that no vessel shall be considered as engaging in trade between two ports of one of the contracting States merely because it carries between those ports passengers holding through tickets or merchandise consigned on through bill of lading to or from some place outside the territories of that State.

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Source: https://www.legislation.gov.uk/ukpga/Geo5/5-6/1/schedule/part/12 (the official version)
Page: https://openlegislation.uk/anglo-portuguese-commercial-treaty-act-1914/schedule/part-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.