"Applications are invited for Captain and First Officer Dash 8-300 / -Q400 common crew positions."
Isn't it a bit outdated to think that the -300 and -400 aircraft can be operated as a common fleet with common crew positions??
PX didn't when they operated the -400 last time (separate fleet even?)...and QF haven't, despite many continual years of operating the -400 alongside the "classic" versions.