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, and would not secure another series victory until 1996, after the fall of apartheid and the introduction of neutral referees. The 1976 tour contributed to the Gleneagles Agreement being adopted by the Commonwealth Heads of State in 1977.