"and the removal of the colour-bar"
Apartheid era railway station sign
Public DomainApartheid era railway station sign - Credit: Kerri

The colour bar describes the wide range of restrictions imposed on black, Indian and mixed race South Africans, on the basis of race.  The colour bar determined which groups were allowed to vote, where people were allowed to live, who could do what jobs, what they could be paid, and who they were allowed to have relationships with. 

This stringently enforced racial classification was in place long before apartheid became official government policy.  The 1911 Mines and Works Act, for example, reserved various skilled mining occupations for white people – guaranteeing job protection and better pay for white workers over other races.