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Section 23. Privileges and immunities are granted to experts in the interests of the United Nations and not for the personal benefit of the individuals themselves. The Secretary-General shall have the right and the duty to waive the immunity of any expert in any case where, in his opinion, the immunity would impede the course of justice and it can be waived without prejudice to the interests of the United Nations. Article Vll.—United Nations Laissez-passer Section 24. The United Nations may issue United Nations laissez-passer to its officials. These laissez-passer shall be recognized and accepted as valid travel documents by the authorities of Members, taking into account the provisions of Section 25. Section 25. Applications for visas (where required) from the holders of United Nations laissez-passer, when accompanied by a certificate that they are travelling on the business of the United Nations, shall be dealt with as speedily as possible. In addition, such persons shall be granted facilities for speedy travel. Section 26. Similar facilities to those specified in Section 25 shall be accorded to experts and other persons who, though not the holders of United Nations laissez-passer, have a certificate that they are travelling on the business of the United Nations. Section 27. The Secretary-General, Assistant SecretariesGeneral and Directors travelling on United Nations laissezpasser on the business of the United Nations shall be granted the same facilities as are accorded to diplomatic envoys. Section 28. The provisions of this article may be applied to the comparable officials of specialized agencies if the agreements for relationship made under Article 63 of the Charter so provide. Article Vlll.—Settlement of Disputes Section 29. The United Nations shall make provisions 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 SecretaryGeneral.