Whilst saying where it is may be possible, telling people how to use it (when even people on this forum cannot agree) is asking a lot. That said, most ticket office staff will access it through The Manual, which is not available to the public, and may not know it is freely available on the ATOC website.
Well I did say brief! - Meaning basic principles.
Perhaps ATOC might like to complicate it so everyone can understand and agree on it. whilst still trying to maintain all the 'reasonable routes' that are supposed to be retained?