# Arbitration (International Investment Disputes) Act 1966, Article 27


(1) No Contracting State shall give diplomatic protection, or bring an international claim, in respect of a dispute which one of its nationals and another Contracting State shall have consented to submit or shall have submitted to arbitration under this Convention, unless such other Contracting State shall have failed to abide by and comply with the award rendered in such dispute.
(2) Diplomatic protection, for the purposes of paragraph (1), shall not include informal diplomatic exchanges for the sole purpose of facilitating a settlement of the dispute.

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Source: https://www.legislation.gov.uk/ukpga/1966/41/schedule/part/3/crossheading/article-27 (the official version)
Page: https://openlegislation.uk/arbitration-international-investment-disputes-act-1966/schedule/part-3/crossheading-article-27
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.