In 1984, Prime Minister David Lange barred nuclear-powered or nuclear-armed ships from using New Zealand ports or entering New Zealand waters. Under the New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987, territorial sea and land of New Zealand became nuclear weapons and nuclear-powered ship free zones. It does not ban nuclear power stations. A research reactor was operated by the University of Canterbury until 1981. Official planning for a nuclear power station continued until the 1980s. A nuclear reactor provided electricity for McMurdo Station, in the New Zealand Antarctic Territory from 1962–1972.