Article 9 provisional measures Nothing in this Convention shall prevent a Contracting State, in time of war or other grave and exceptional circumstances, from taking provisionally measures which it considers to be essential to the national security in the case of a particular person, pending a determination by the Contracting State that that person is in fact a stateless person and that the continuance of such measures is necessary in his case in the interests of national security. Article 10 continuity of residence 1. Where a stateless person has been forcibly displaced during the Second World War and removed to the territory of a Contracting State, and is resident there, the period of such enforced sojourn shall be considered to have been lawful residence within that territory. 2. Where a stateless person has been forcibly displaced during the Second World War from the territory of a Contracting State and has, prior to the date of entry into force of this Convention, returned there for the purpose of taking up residence, the period of residence before and after such enforced displacement shall be regarded as one uninterrupted period for any purposes for which uninterrupted residence is required. Article 11 stateless seamen In the case of stateless persons regularly serving as crew members on board a ship flying the flag of a Contracting State, that State shall give sympathetic consideration to their establishment on its territory and the issue of travel documents to them or their temporary admission to its territory particularly with a view to facilitating their establishment in another country. 1954 c o n v e n t i o n • stateless persons 9