There were fears the Springboks, who aren’t participating in this year’s tournament due to the affects of COVID-19, would link up with northern hemisphere nations.
The tournament is currently being played in Australia but as a Tri-Nations involving Australia, New Zealand and Argentina.
However, SANZAAR announced on Wednesday South Africa were on board for 2021 and beyond.
The championship will be restructured to include a 12-match format with teams playing each other on a home and away basis.