Well, that begs the obvious question, then. How is wearing a GPS during a race allowed? In a national championship, of all things?
Not that I'm implying that you used it, but the possibility is obviously out there. I'd definitely like to use my 405 for post-race tracking, but in a big race, that seems totally unfair.
I think the organizers view the risk of GPS-assisted cheating so low that it isn't worth establishing a control to prevent it. Seems like a reasonable.