Complex sentence: It came into existence on July 1,1978, when self-government came into effect, and lasted until January 1,1979, when Chief Minister Paul Everingham decided to promote Nick Dondas to a ministerial position and reshuffled the other portfolios accordingly.
Split into simpler sentences: It came into existence on July 1,1978, when self-government came into effect. The ministry lasted until January 1,1979, when Chief Minister Paul Everingham decided to promote Nick Dondas to a ministerial position and reshuffled the other portfolios accordingly.