I would say that the first part of Driver rule 2 is wrong, the spotter and driver should both understand that the spotter is actually driving the vehicle remotely through the driver. Once a spotter is asked for, the driver becomes nothing more than a trained chimp behind the wheel, and if the spotter wants the driver to continue he should tell him such. This why the trust issue becomes so important, so that the driver doesn't act on their own, while being spotted.
A couple other rules should be added, such as always have eye contact between the spotter and the driver, and the spotter is in charge of what is going on around the vehicle.
More often than not using a spotter on the trail would lead to far less trail side repairs and stoppage of traffic.
