[2] The elected additional members were chosen by proportional representation, by means of the single transferable vote.

The voters in the Orange Free State, Transvaal and South West Africa had to be qualified white people, throughout the whole period when those areas were represented in the House of Assembly.

The Cape of Good Hope had a franchise based on property and wage qualifications, open to people of all races.

At the time of the National Convention in 1908, which drafted the terms of what became the South Africa Act, "22,784 Native and Coloured persons out of a total of 152,221 electors" were entitled to vote in Cape elections.

[7] Similarly the coloured voters in Cape Province were removed from the common (or general roll), under the Separate Representation of Voters Act 1951, although as the Act was challenged during the Coloured vote constitutional crisis and not completely enforced until the later 1950s, the last year to see non-whites participate in a general election was in 1953.

These seats were abolished in 1968 through the Separate Representation of Voters Amendment Act, 1968, enacted on behalf of Prime Minister B. J. Vorster.

Abbreviations and notes: The following table reflects only those members elected from general roll electoral divisions.