<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Mwenenzi:
The "but not inside 30 minutes" is a bit puzzling. If you are a walk on self loading cargo (ie pax with no checked luggage) why not cut of 15 minutes before. The chances of QF selling a vacnt seat in the last 30 minutes prior to departure are slight. 4 hours before they could get a (high $$)paying pax walk up </font>
Just guessing here, but perhaps they set the 30 min limit since some of the Quick-Check machines are outside security and they want to ensure that the self loading cargo can get themselves and their carry-on from the Quick-Check machine, through security and to the gate comfortably in time.
And since the security lines can be quite variable, they don't want to be caught out with people arriving late to the gate.