Adermann was elected as the member for
Fisher following the retirement of his father at the
1972 election and represented the
Country Party (National Country Party from 1975). He was appointed
Minister for the Northern Territory following the
Fraser government's win at the
1975 election and held it until its abolition in September 1978. He put in place the arrangements for
Northern Territory self-government and was responsible for the establishment of
Uluru National Park and continuing the reconstruction of
Darwin after
Cyclone Tracy. In July 1978, he was appointed
Minister for Veterans' Affairs and held it until November 1980. He was responsible for establishing an inquiry into the effects of
Agent Orange on Australian servicemen who had fought in the
Malayan Emergency and the
Vietnam War. Ahead of the
1984 election, a redistribution transferred the most conservative portions of Fisher, including his home to the new
Division of Fairfax. Adermann ran for this seat and won it easily. He continued to represent Fairfax until his retirement from parliament at the
1990 election. ==Later life==