Women became the major source of resistance to many race-related restrictions during the apartheid era, especially the pass laws, which required Africans to carry documents permitting them to be in white-occupied areas. The Women's Defence of the Constitution League, later known as the Black Sash, was formed in 1955, first to demonstrate against such laws and later to assist pass-law violators.[8] Black Sash established pass-law advice centers in many cities and helped reduce sentences or assist violators in other ways.