 The 1976 All Blacks tour of apartheid South Africa generated much controversy , and led to the boycott of the 1976 Summer Olympics in Montreal by 33 African nations after the IOC refused to ban the team . New Zealand again failed to win the test series in South Africa : they did not do so until 1996 , after the fall of apartheid . The 1976 Tour contributed to the Gleneagles Agreement being adopted by the Commonwealth Heads of State in 1977 . 
