It was sworn in on 17 October 1984 after the resignation of Chief Minister Paul Everingham to run for the Australian House of Representatives and his replacement by Ian Tuxworth.
The second ministry was sworn in on 21 December 1984, following a major reshuffle by newly appointed Chief Minister Tuxworth.
The role of Leader of Government Business is usually filled by a Cabinet member; however, from 26 February 1985 the position was occupied by Ray Hanrahan, who did not hold ministerial office.
The portfolio was later dropped due to waning interest in the issue when Robertson resigned from parliament in March 1986.
Robertson's prior role as Health Minister was filled by new ministerial appointment Ray Hanrahan.