Article 5 1. The sending State may, after it has given due notification to the receiving States concerned, accredit a head of mission or assign any member of the diplomatic staff, as the case may be, to more than one State, unless there is express objection by any of the receiving States. 2. If the sending State accredits a head of mission to one or more other States it may establish a diplomatic mission headed by a chargé d’affaires ad interim in each State where the head of mission has not his permanent seat. 3. A head of mission or any member of the diplomatic staff of the mission may act as representative of the sending State to any international organization. Article 6 Two or more States may accredit the same person as head of mission to another State, unless objection is offered by the receiving State. Article 7 Subject to the provisions of articles 5, 8, 9 and 11, the sending State may freely appoint the members of the staff of the mission. In the case of military, naval or air attachés, the receiving State may require their names to be submitted beforehand, for its approval. Article 8 1. Members of the diplomatic staff of the mission should in principle be of the nationality of the sending State. 2. Members of the diplomatic staff of the mission may not be appointed from among persons having the nationality of the receiving State, except with the consent of that State which may be withdrawn at any time. 3. The receiving State may reserve the same right with regard to nationals of a third State who are not also nationals of the sending State. Article 9 1. The receiving State may at any time and without having to explain its decision, notify the sending State that the head of the mission or any member of the diplomatic staff of the mission is persona non grata or that any other member of the staff of the mission is not acceptable. In any such case, the sending State shall, as appropriate, either recall the person concerned or terminate his functions with the mission. A person may be declared non grata or not acceptable before arriving in the territory of the receiving State. 4