23 July 1954
The then African National Congress (ANC) Secretary-General, Walter Sisulu, was served with two notifications in terms of the Suppression of Communism Act (Act 44 of 1950) . In terms of these notifications Sisulu was directed to resign as member, official or office-bearer from certain organisations such as the ANC. He was also prohibited from taking part in the activities of these organisations and from attending any gathering at any place within the Union of South Africa or the area South West Africa, for a period of two years. However, Sisulu defied the notice and attended a gathering in Bochabelo location.  
References

Nelson Mandela Centre of Memory, ‘Timeline of Walter Sisulu’ from Nelson Mandela Centre of Memory, Available at www.nelsonmandela.org [Accessed: 07 July 2013]