(vi) On travel authorized for medical, safety or security reasons or in other appropriate cases when, in the opinion of the Secretary-General, there are compelling reasons for paying such expenses.
㈥ 因医疗、安全或保障上的理由或在其他适当情况下经秘书长认为有迫不得已的理由需要支付此种旅费时获准旅行。