Tend to disagree, with this ... and yeah i am new and all... but all those things are part of achieving a personal best.... unless its an individual time trial then of course drafting would be illegal...
Normally at the startline, if you have bought one already they will give you one @ the start, they will pick it up with your ID. If not you can get one on the day.
Normally once they have found been through all your photos they will send you an email to go take a look, on occassion there are still more found after that.
Have to say i am bit of a roadie, so i found... it tough and challenging, out there....but wow...good fun....!!! really well organized... , learnt alot going through a fence , over the handle bars...!! next time i am going to try stay on the bike