IBCCES Accessibility Card (IAC)

My son (13) is going tomorrow with his friend and his friend’s family and my son has the accessibility pass, and just wondering if anyone knows how that works at this park?

We mainly use it when we go to Universal Studios, but this summer we added Six flags.

Can he still utilize it with me not there as long as his friend’s mom helps him? He has the IAC app with his approved card on his phone, he would just need to go to customer service?

Thanks for any assistance you can give.