It depends how you state these things, a bit like politics. Since Coondewanna is merely the airport that serves Area C then there is NO Coondewanna "contract". There is an HWE contract which has just been extended for 4 years with NJS but there are other companies who need to fly staff there and they may well be using other air service providers.
I seem to recall that before the strip was sealed Network and Skippers both flew there.