State/Territory column takes you to that state’s elections office or voter information site, the REGISTER column takes you to a voter registration PDF for that state. Yellow indicates you need to register as a Republican or independent if you want to vote for Ron Paul in the primary.
First time voters might need to register in person, go to your states webpage for more information.
Grab some stamps and envelopes, print some voter registration forms, take them to your next Ron Paul MeetUp, and get everyone registered!