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Section 26. The United Nations shall make provision for appropriate modes of settlement of:

(a) Disputes arising out of contracts or other disputes of a private law character, to which the United Nations is a party;

(b) Disputes involving any official of the United Nations who by reason of his official position enjoys immunity, if immunity has not been waived by the Secretary-General.

Section 27. Any dispute between the United Nations and the Swiss Federal Council concerning the interpretation or application of this Interim Arrangement or of any supplementary arrangement or agreement which is not settled by negotiation shall be submitted for decision to a board of three arbitrators of whom the first shall be appointed by the Swiss Federal Council, the second by the Secretary-General of the United Nations, and a presiding arbitrator by the President of the International Court of Justice, unless in any specific case the parties agree to resort to a different mode of settlement.

Section 28. This Interim Arrangement shall enter into force immediately upon its signature on behalf of the Swiss Federal Council and by the Secretary-General of the United Nations or on his behalf.

Section 29. The provisions of this Interim Arrangement can be modified only by agreement between the Secretary-General and the Swiss Federal Council. If agreement cannot be reached, the Secretary General or the Swiss Federal Council may denounce the whole, or any section, of this Arrangement. In this case, unless the Secretary-General and the Swiss Federal Council otherwise agree, the Arrangement or the sections in question shall remain in force for three months from the date of such denunciation.

Done and signed at Berne, on 11 June 1946, and at New York, on 1 July 1946, in four copies, two in French and two in English, the texts in both languages being equally authentic.