The National Union of South African Students (NUSAS) a White,  student organisation, served an important role in unifying and voicing student protests against laws decreed to limit the freedoms of Black South Africans at mainly English-medium universities . As a student organisation, NUSAS was prohibited from accepting affiliation from Black Student bodies. NUSAS addressed issues of significant importance to Black South Africans, such as condemning the Pass laws, endorsing a call for a National Convention, and protesting against the 1962 Sabotage Act. This organisation constantly worked towards social desegregation. The Apartheid Government appointed a commission of inquiry headed by Alwyn L. Schlebusch to investigate the organisation's activities. The Schlebusch Commission Report, as it came to be known, resulted in the banning of eight NUSAS leaders and ex- NUSAS leaders on the 27th of February 1973. Those banned were Neville Curtis, Clive Keegan, Paul Pretorius, Sheila Lapinsky, Rick Turner (a lecturer), Paula Ensor, Chris Wood, and Philip Le Roux.
References

Mzamane.M et al, The Black Consciousness Movement as published in South African Democracy Education Trust, The Road to Democracy, in South Africa Vo12 (1970-1980), Paarl: South Africa, Zebra Press|Legassick. M , NUSAS in the 1970s as published in South African Democracy Education Trust, The Road to Democracy, in South Africa Vo12 (1970-1980), Paarl: South Africa, Zebra Press