The Reservation of Separate Amenities Act was a piece of legislation passed by the Apartheid government in South Africa. It stipulated that public facilities could either be for the use of white people only or for the use of black people only. It meant that certain facilities, such as public toilets, swimming pools, park benches, and schools, were for the exclusive use of the white population, while separate (typically inferior) facilities were designated for use by black people.
As with every piece of Apartheid legislation, this Act was designed to keep black people and white people apart. In doing this—preventing ordinary white people from engaging with ordinary black people (apart from those who worked as their servants) on a daily basis—the Apartheid government ensured the longevity of the racist ideology which formed the backbone of Apartheid.
The Act was passed in 1953 and was only repealed in 1990, meaning that it was in place for the majority of the Apartheid regime.
In terms of long-lasting effects, it is interesting to note that this act has no relevance upon South African society today. Everybody uses whichever public facilities they need to. The effects of other acts, such as the Group Areas Act, which dictated where white and black people could respectively live and work, can still be seen today, with certain areas still inhabited predominantly by certain races.