The insurers, as the agents in charge of managing the program, consisted of 2 types of medical insurance societies. The class 1 medical insurance society was made up of the employers and class 1 employees. The class 2 medical insurance society consisted of any resident within regional jurisdiction of the medical insurance society who wanted to join. To provide health insurance for the uninsured, the minister of health and social affairs could order a medical insurance society to join the Central Federation of Medical Insurance Societies (CFMIS). The major role of CFMIS was to ensure stable insurance financing and to manage medical and welfare institutions. Both medical insurance societies and the CFMIS were regulated by the rules established in civil law.