packages constituting the bag but he shall not be considered to be a diplomatic courier. The mission may send one of its members to take possession of the diplomatic bag directly and freely from the captain of the aircraft. Article 28 The fees and charges levied by the mission in the course of its official duties shall be exempt from all dues and taxes. Article 29 The person of a diplomatic agent shall be inviolable. He shall not be liable to any form of arrest or detention. The receiving State shall treat him with due respect and shall take all appropriate steps to prevent any attack on his person, freedom or dignity. Article 30 1. The private residence of a diplomatic agent shall enjoy the same inviolability and protection as the premises of the mission. 2. His papers, correspondence and, except as provided in paragraph 3 of article 31, his property, shall likewise enjoy inviolability. Article 31 1. A diplomatic agent shall enjoy immunity from the criminal jurisdiction of the receiving State. He shall also enjoy immunity from its civil and administrative jurisdiction, except in the case of: (a) A real action relating to private immovable property situated in the territory of the receiving State, unless he holds it on behalf of the sending State for the purposes of the mission; (b) An action relating to succession in which the diplomatic agent is involved as executor, administrator, heir or legatee as a private person and not on behalf of the sending State; (c) An action relating to any professional or commercial activity exercised by the diplomatic agent in the receiving State outside his official functions. 2. A diplomatic agent is not obliged to give evidence as a witness. 3. No measures of execution may be taken in respect of a diplomatic agent except in the cases coming under subparagraphs (a), (b) and (c) of paragraph 1 of this article, and provided that the measures concerned can be taken without infringing the inviolability of his person or of his residence. 4. The immunity of a diplomatic agent from the jurisdiction of the receiving State does not exempt him from the jurisdiction of the sending State. 9