 In September 1993, the Fourth National Government ratified the United Nations Framework Convention on Climate Change (the UNFCCC).In July 1994, four months after the UNFCCC came into force, the Fourth National Government announced a number of specific climate change policies.The Fourth National Government said that if emissions were not stabilised at 1990 levels by the year 2000, a low-level carbon charge would be introduced in December 1997.