The two were arrested for contravening the Immorality Act which forbade interracial relationships.
God, the scandal if I were discovered and charged under that Immorality Act of our enlightened government!
And in 1957, Section 16 of the Immorality Act was introduced, forbidding sexual relationships between whites and nonwhites.
Also in 1950, the Immorality Act was passed, which criminalized all sexual relations between whites and non-whites.
They were looking for white men with black girls, their Immorality Act to keep their precious white blood pure.
At about the same time came the Immorality Act, which made sexual relations between different races a crime against the state.
This act was replaced by a similar prohibition in section 14 of the Immorality Act, 1957.