V8 Supercars are confident of returning to a 28-car field next year with three unused entries put up for sale.
Chief executive James Warburton on Tuesday announced the start of a tender process for the dormant racing entitlement contracts (RECs), which were handed back by Tekno Autosports, Lucas Dumbrell Motorsport and Tony D'Alberto Racing before the 2014 season.
Each REC allows its owner to race one car, with holders also entitled to a share of V8s' end-of-year profits.
The move opens the door for new teams to enter the category, existing outfits to expand or previous entrants to return.
There is also the possibility of teams competing in V8 Supercars' development series to step up into the premier class.