1:Ticketmaster has never heard of the ARC - the understand "Perth Spirit"
2: You do not get children's tickets with Season Passes - don't know if this is intentional or not
3: The ticketmaster agent will ask you to pay for the children's tickets - you must re-iterate that they are free with a paying adult - some magic screen appears for the agent when he types in something
4: The screen will only issue 1 free childs ticket with a paying adult

I'm never going to buy tickets to a rugby game again without an adult these people know me by name now and use me to train up the apprentice