Annual Power Pass at Publix?

[palm1]

If you purchase the annual power pass (Fla resident) at Publix, when you get to the theme park, where do you go for first time use at park? I'm assuming I would have to stand in line either at the ticket counter or at guest relations for first time use to activate it...not sure how that works.

Is the procedure any different if I purchase annual pass online? Which is the better route?

Thanks.