 The number of members is not fixed but can vary with boundary changes resulting from electoral redistributions, which are required on a regular basis.The most recent overall increase in the size of the House, which came into effect at the 1984 election, increased the number of members from 125 to 148.It reduced to 147 at the 1993 election, returned to 148 at the 1996 election, has been 150 since the 2001 election, and has increased to 151 at the 2019 Australian federal election.