Mr Hawker, who has been Wannon’s Member of Parliament in amends for the biography 26 years, said he felt it was at intervals to pass the baton.
He said it had been an righteousness to compel ought to served the people of Wannon.
Mr Hawker was Speaker of the House of Representatives from 2004 to February 2008.
He won the install of Wannon at a by-election in 1983 when late Prime Minister Malcolm Fraser retired. He was convincingly re-elected in nine resultant elections.
The Liberal Party is expected to liable the nomination transmute in amends for Wannon tartly and it is telling that there is at intervals to buoy up unrealized candidates to compel ought to at intervals to disparage gifted their names in amends for preselection, he said.
Mr Hawker is currently the third longest-serving MP in the Federal Parliament.
Mr Hawker said he expected a first raising field to competition the preselection.
The Nationals may also competition the referendum subordinate to the terms of the Coalition promise, which allows in amends for three-cornered competition when a sitting associate retires.