Here in WA, I have family in Carnarvon (CVQ/YCAR). If Rex was to stop operating then not sure which airline would take over, bearing in mind that when the E.O.I for the coastal routes (Carnarvon, Monkey Mia, Albany & Esperance) in WA went out for tender last year only one airline expressed interest......Rex.
Rex have had these routes since about June 2018.