Norm,
This is an excellent summary.
Aside from "risk" being subjective, I would add that the laws seem (to me) to be very inflexible. IE they enact regulations without measuring the risk of a given situation and therein lies the rub.
How big is the risk for me to move 1 fish from one pond to the next? It depends on the specific circumstances. In some cases - very little, in others - perhaps there is great risk.