Answer
Helen Clark, New Zealand's Prime Minister from 1999 to 2008, acknowledged the legacy of her predecessor, David Lange, in shaping the country's nuclear-free stance. Lange, who served as Prime Minister from 1984 to 1989, played a pivotal role in passing the New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987, which prohibited nuclear-powered or nuclear-armed ships from entering New Zealand's territorial waters.