Premier Colin Barnett must make third party access to the Pilbara railways of BHP Billiton and Rio Tinto a condition of any relaxation of their respective state agreements, the North West Iron Ore Alliance said today.

Premier Colin Barnett must make third party access to the Pilbara railways of BHP Billiton and Rio Tinto a condition of any relaxation of their respective state agreements, the North West Iron Ore Alliance said today.