The legal systems of Sahelian African countries combine customary law, Islamic law, French colonial law, and civil law introduced since independence in 1960. Utilizing a framework developed by the Faculty of Law, University of Dakar, Senegal, and the Development Law and Policy Program, Center for Population and Family Health, Columbia University, the Sahel Institute undertook a comprehensive study of the legal and social status of women in Burkina Faso, Mali, Niger, and Senegal. Since 1960, Burkina Faso, Mali, and Senegal have replaced French family law with national marriage codes. Niger has not yet adopted a family code; the laws on the family inherited from the French remain in force. The postindependence marriage codes have attempted to give young women more say in choosing a husband, to regulate the practice of bride price, and to limit the practice of polygyny. They have done this by integrating customary law and government-passed civil law. Mali, Niger, and Senegal have repealed provisions in their codes prohibiting the distribution of contraception, based on a 1920 French law. Although it has taken no formal legal action, Burkina Faso has adopted family planning policies that effectively nullify the 1920 law.