The Fourth Amendment of the Constitution of South Africa made two technical changes relating to the calling of provincial elections and the choice of delegates to the National Council of Provinces.
It was enacted by the Parliament of South Africa, signed by Acting President Thabo Mbeki on 17 March 1999, and came into force two days later.
It was signed and came into force simultaneously with the Fifth Amendment; the two amendments were separated because the Fourth involved provincial matters and had to be passed by the National Council of Provinces while the Fifth did not.
The Fifth Amendment made the same change for elections to the National Assembly.
The second was to modify the formula for the allocation of delegates' seats in the National Council of Provinces to parties.