One question I always had about being expected to follow the exact route - what happens if you do take a very slightly different route, and how does anyone know? I've done a couple of brevets where I missed a turn and instead of left-right-right-left I effective did right-left-left-right - the end result was that my route went almost exactly parallel to the intended route for maybe half a mile or less before joining up again. If that had been a prescribed route event would I have been warned about it, sanctioned, disqualified, or what?
One of the different countries is the US and some of the newbie RUSA members, or prospective members, appear confused already. Clarification to those potential RUSA newbies that, in the US, all Permanents and Brevets are prescribed routes is a good idea. (Even some veteran RUSA members sometimes forget that the courses here are prescribed routes.)