private staff shall normally cease at the moment when the person concerned leaves the receiving State or on the expiry of a reasonable period in which to do so, whichever is the sooner, but shall subsist until that time, even in case of armed conflict. In the case of the persons referred to in paragraph 2 of this article, their privileges and immunities shall come to an end when they cease to belong to the household or to be in the service of a member of the consular post provided, however, that if such persons intend leaving the receiving State within a reasonable period thereafter, their privileges and immunities shall subsist until the time of their departure. 4. However, with respect to acts performed by a consular officer or a consular employee in the exercise of his functions, immunity from jurisdiction shall continue to subsist without limitation of time. 5. In the event of the death of a member of the consular post, the members of his family forming part of his household shall continue to enjoy the privileges and immunities accorded to them until they leave the receiving State or until the expiry of a reasonable period enabling them to do so, whichever is the sooner. Article 54 Obligations of third States 1. If a consular officer passes through or is in the territory of a third State, which has granted him a visa if a visa was necessary, while proceeding to take up or return to his post or when returning to the sending State, the third State shall accord to him all immunities provided for by the other articles of the present Convention as may be required to ensure his transit or return. The same shall apply in the case of any member of his family forming part of his household enjoying such privileges and immunities who are accompanying the consular officer or travelling separately to join him or to return to the sending State. 2. In circumstances similar to those specified in paragraph 1 of this article, third States shall not hinder the transit through their territory of other members of the consular post or of members of their families forming part of their households. 3. Third States shall accord to official correspondence and to other official communications in transit, including messages in code or cipher, the same freedom and protection as the receiving State is bound to accord under the present Convention. They shall accord to consular couriers who have been granted a visa, if a visa was necessary, and to consular bags in transit, the same inviolability and protection as the receiving State is bound to accord under the present Convention. 4. The obligations of third States under paragraphs 1, 2 and 3 of this article shall also apply to the persons mentioned respectively in those paragraphs, and to official communications and to consular bags, whose presence in the territory of the third State is due to force majeure. 22