I would like to attend some of the Tech Sessions and Seminars at the National Convention in San Jose this July. To do so do I have to sign up or register for each one to ensure that I'll get a seat? If so where or how do I do this?
I found a registration form in the Driveline but it looks like it's for if you want to bring your family or judge or have a car judged or take in some of the tours but I don't see where it mentions anything about the tech sessions or seminars.
So do I have to sign up for these seminars or do I just show up? 

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