Hi Resolute,
This is taken straight from pilot career info on the DFR website:
"...preferred maximum age on entry to ADFA is 24.5 years so that candidates will not be more than 27.5 years of age on commencement of pilot training. Applicants older than 27.5 years of age may be considered for selection if they demonstrate significant potential for Air Force Pilot training."
I would assume you would have to score exceptionally well at the YOU session and really impress at Assessment to even be considered for flight screening. In terms of showing dedication to the job I’m sure they would want to know current/previous employment and flight motivation (i.e have you done any flying). It's likely that DFR staff would discourage your application due to your age, however nothing’s impossible if you want it badly enough. Keep in mind the IMPS for RAAF pilots is 13.5 years, so you’ll be over 45 years of age before you can even leave.