As an instructor at the Royal Aero Club of NSW at Bankstown in the late 70's my mature age student wanted to do a 'nav-ex' from Bankstown to Mascot as he was leaving on a Qantas flight to the USA that day.
We landed Sydney 16, taxied up to the old International terminal, shut down next to his 747 that was going to be taking him to the USA, customs officers met him and escorted him up through the bowels of the International terminal and I started up and flew back to Bankstown.
All in a days work at the 'Royal'.