24 May 1963
The enactment of the Transkei Constitution Act (No 48 of 1963), which came into effect on 30 May 1963, gave partial self-government to the Transkei within the Republic of South Africa.  This was in accordance with the Transkei Self-Government Bill. This was endorsed by the Transkei Territorial Authority in December 1962. The Act provided for a legislative assembly to exercise control over finance, justice, interior, education, agriculture and forestry, roads and public works. Kaiser Daliwonga Matanzima was elected as chief minister when Transkei was granted self governance.
References

O’ Malley P., 1963. The Transkei Constitution Act No 48, from the Nelson Mandela Centre of Memory, [online], Available at www.nelsonmandela.org  [Accessed: 24 April 2014]|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.