# Geneva Conventions Act 1957, Paragraph 3


(a) Unless otherwise agreed by the Parties concerned, all enquiries shall be undertaken by a Chamber consisting of seven members appointed as follows:
(i) five members of the Commission, not nationals of any Party to the conflict, appointed by the President of the Commission on the basis of equitable representation of the geographical areas, after consultation with the Parties to the conflict;
(ii) two ad hoc members, not nationals of any Party to the conflict, one to be appointed by each side.
(b) Upon receipt of the request for an enquiry, the President of the Commission shall specify an appropriate time-limit for setting up a Chamber. If any ad hoc member has not been appointed within the time-limit, the President shall immediately appoint such additional member or members of the Commission as may be necessary to complete the membership of the Chamber.

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Source: https://www.legislation.gov.uk/ukpga/Eliz2/5-6/52/schedule/FIFTH/part/V/chapter/13/paragraph/3 (the official version)
Page: https://openlegislation.uk/geneva-conventions-act-1957/schedule-FIFTH/part-V/chapter-13/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.