The N2 Riders Manual states that you have to bring a picture ID and email confirmation with you to registration. I did not get the email and there seems to be no way to request an event notification online.
No more email confirmations. Still bring ID to registration. There will be a release form to sign at registration similar to the one that you sign at the gate. I'm not sure if we are still doing express registration.
The riders manual doesn't reflect this recent change.