New College

I’m a senior in high school right now, and I’m planning on going to UA next year. I’ll nearly get out of all GED requirements because of my AP credit, and I am looking to start a major in the New College…when do I apply to be a part of this program? Can I do it over the summer so I can start planning my classes for my major when I register at UA in the fall? I would like to do it as soon as possible but the website didn’t make it clear when that was.
Thanks!