In 1969, the constitution was modified. The most significant 1969 modification was the formal separation of two electoral rolls by race. The A roll was reserved for Europeans and the B roll for non-Europeans. The Assembly constituencies were reformed so that there were 50 A roll, and 8 B roll seats. In addition, the tribal chiefs were able to elect another 8 members. Effectively, the result was that 270,000 whites had 50 seats and 6 million Africans had 16 seats in the Assembly. These reforms served only to reinforce black rejection of the system.