The changes imposed a two-term limit on the presidency, required presidential candidates to be born to two Zambian citizens by birth or descent, and required National Assembly candidates to give up their chieftaincy.
UNIP believed these changes were specifically aimed at their longtime leader, Kenneth Kaunda, whose parents were Malawian and had previously served as the country's first president from 1964 to 1991.
The changes would have also excluded UNIP's vice president, a chief.
[1] Subsequently, the ruling Movement for Multi-Party Democracy won a comfortable victory in both elections, taking 131 of the 150 elected seats in the National Assembly, and its candidate, Frederick Chiluba, winning 73% of the vote in the presidential election.
Out of an estimated 4,500,000 eligible voters, only 2,267,382 registered.