Original sentence: After this Act was passed by the Lange Labour government, the United States government suspended its ANZUS obligations to New Zealand, seeing New Zealand's rejection of United States Navy vessels as a betrayal of the treaty.New Zealand’s three decade anti-nuclear campaign is the only successful movement of its type in the world which resulted in the nation's nuclear-free zone status being enshrined in legislation.The legislation was a milestone in New Zealand's development as a nation and seen as an important act of sovereignty, self-determination and cultural identity
Edited sentence: After this Act was passed by the Lange Labour government, the United States government suspended its ANZUS obligations to New Zealand because the barring of its navy from New Zealand's territory effectively rendered the ANZUS treaty inoperable