Essentially, that's correct.
In the precursor control regulations, there's no offence for simple possession of specific chemicals, regardless of the quantity. So in your scenario of the truckload of chemical A going somewhere, there would be no offence in the current legislation. With the legislation we've seen in front of us today, if we could prove in a court of law beyond a reasonable doubt that the driver of that vehicle knew he was taking that chemical to a lab or to someone else with the intent of using it to make methamphetamine, then we would have grounds to stop that vehicle, arrest that person, and seize that quantity of chemicals.