(5) In case of expulsion of the worker or his family, the cost should not be borne by them. II. Social Policy 9. Each Member should, in consultation with representative organisations of employers and workers, formulate and apply a social policy appropriate to national conditions and practice which enables migrant workers and their families to share in advantages enjoyed by its nationals while taking account, without adversely affecting the principle of equality of opportunity and treatment, of such special needs as they may have until they are adapted to the society of the country of employment. 10. With a view to making the policy as responsive as possible to the real needs of migrant workers and their families, it should be based, in particular, on an examination not only of conditions in the territory of the Member but also of those in the countries of origin of the migrants. 11. The policy should take account of the need to spread the social cost of migration as widely and equitably as possible over the entire collectivity of the country of employment, and in particular over those who profit most from the work of migrants. 12. The policy should be periodically reviewed and evaluated and where necessary revised. A. REUNIFICATION OF FAMILIES 13. (1) All possible measures should be taken both by countries of employment and by countries of origin to facilitate the reunification of families of migrant workers as rapidly as possible. These measures should include, as necessary, national laws or regulations and bilateral and multilateral arrangements. (2) A prerequisite for the reunification of families should be that the worker has, for his family, appropriate accommodation which meets the standards normally applicable to nationals of the country of employment. 14. Representatives of all concerned, and in particular of employers and workers, should be consulted on the measures to be adopted to facilitate the reunification of families and their co-operation sought in giving effect thereto. 15. For the purpose of the provisions of this Recommendation relating to the reunification of families, the family of the migrant worker should include the spouse and dependent children, father and mother. 16. With a view to facilitating the reunification of families as quickly as possible in accordance with Paragraph 13 of this Recommendation, each Member should take full account of the needs of migrant workers and their families in particular in its policy regarding the construction of family housing, assistance in obtaining this housing and the development of appropriate reception services. 17. Where a migrant worker who has been employed for at least one year in a country of employment cannot be joined by his family in that country, he should be entitled-(a) to visit the country of residence of his family during the paid annual holiday to which he is entitled under the national law and practice of the country of employment without losing during the absence from that country any acquired rights or rights in course of acquisition and, particularly, without having his employment terminated or his right to residence in the country of employment withdrawn during that period; or (b) to be visited by his family for a period corresponding at least to the annual holiday with pay to which he is entitled. 18. Consideration should be given to the possibility of giving the migrant worker financial assistance towards the cost of the travel envisaged in the preceding Paragraph or a reduction in the normal cost of transport, for instance by the arrangement of group travel. 19. Without prejudice to more favourable provisions which may be applicable to them, persons admitted in pursuance of international arrangements for free movement of labour should have the benefit of the measures provided for in Paragraphs 13 to 18 of this Recommendation. B. PROTECTION OF THE HEALTH OF MIGRANT WORKERS 20. All appropriate measures should be taken to prevent any special health risks to which migrant workers may be exposed. 21. (1) Every effort should be made to ensure that migrant workers receive training and instruction in occupational safety and occupational hygiene in connection with their practical training or other work preparation, and, as far as possible, as part thereof. (2) In addition, a migrant worker should, during paid working hours and immediately after beginning his employment, be provided with sufficient information in his mother tongue or, if that is not possible, in a language with which he is familiar, on the essential elements of laws and regulations and on provisions of collective agreements concerning the protection of workers and the prevention of accidents as well as on safety regulations and procedures particular to the nature of the work.