Originally Posted by
Excelsius
So to guarantee a spot, I pretty much have to just buy the license so I can sign up in advance online, right?
I'm pretty sure that USAC allows one-day licenses for day-of registration only, but I'm not 100% sure. Check the rulebook. You should read it through several times anyway.
http://www.usacycling.org/news/user/story.php?id=4220