27 November 1976
References

Kalley, J.A.; Schoeman, E. & Andor, L.E. (eds)(1999). Southern African Political History: a chronology of key political events from independence to mid-1997, Westport: Greenwood.|Giliomee, H and Mbenga, B, (2001) New History of South Africa (Cape Town), p.365.