Remember that you are talking about goods that are being processed. If it is based on a certain volume, and then that good is being processed and you're talking about a food product, it's possible that in the processing the volume is altered. If the volume is altered, then the amount that came in may be in fact different from the amount that exists after processing. It would be possible to export a volume that equalled the volume that came in, but still have something left over, because processing can alter the volume, if you will. Things like that could happen. They need to understand what things do happen that cause there to be a leftover amount that can diverted into the Canadian economy, for example, and how they identify whether or not that's happening earlier on in the process.
On June 6th, 2017. See this statement in context.