Former industry minister Ian Macfarlane's intended return to cabinet is being planned to coincide with Warren Truss stepping aside as Nationals leader for Barnaby Joyce early in 2016.
Mr Joyce will then insist Mr Macfarlane be promoted under a new Coalition agreement.
Despite furious Liberals pulling out all stops to stop Mr Macfarlane defecting to the Nationals so he can re-enter cabinet under the Coalition quota system, the former Liberal minister and the Nationals are pushing on unperturbed.
Sources told The Australian Financial Review that Mr Truss, whose retirement from politics has long been expected, will stand down as Nationals leader in March, after the pre-budget expenditure review committee, or razor gang, process is finished.