The Social Insurance Institution was established in 1934 by means of an Ordinance of the President of the Republic of Poland of 24 October 1934 on the amendment of the Law of 28 March 1933 on social insurance. In accordance with the Ordinance, 5 insurance institutions have been merged (Social Insurance Chamber, Sickness Insurance Institution, Accident Insur- ance Institution, White-Collar Employees’ Insurance Institution, Blue-Collar Workers’ Insurance Institution). The reform of 1999 has put before ZUS the biggest challenge in its history, by imposing upon this institution much bigger responsibilities than before. In result of the structural character of the social insurance and health.
