Yeah, not sure but it’s citation city here:
Does say it was someone trying to open a franchise so I guess maybe without the sure knowledge they’d actually make a tonne from it BK were just unwilling to go to court to try to sort it out?
EDIT: looks like there were some Burger Kings around but they decided HJ was the more popular name
https://www.smh.com.au/business/burger-king-slips-into-hungry-jacks-uniform-20030602-gdguzj.html