Seat changes could pose a threat to a federal cabinet minister and even the whole Coalition Government.
Sixteen years after its last change, federal parliament is set to gain a seat.
The nation's political representation is set for a shake-up, with seats across several states and territories soon to change to better represent the country's population shifts.
The Australian Electoral Commission, which determines the number of seats, has decided Victoria and the Australian Capital Territory will each gain one seat.
South Australia, however, will lose a federal MP, bringing the total number of lower-house electorates to 151.
The redistribution is potentially bad news for the Turnbull Government, already holding onto power with just a one-seat majority.
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