The uncertainty test is extremely broad, and it avoids the scientific rigour that is already in place for products that are licensed in Canada through the health regulatory-making process.
For that standard, the similar standard that would be appropriate would be for the other powers that are already in the Food and Drugs Act: that there is a “serious or imminent” health risk, that there is a “risk of injury to...health”, or that it may have a “risk of injury to...health”. That drafting is reasonable, and there may be stakeholders and other parties that are concerned about that from past experience.
However, I think the addition of this uncertainty clause really takes away from the basic requirement that there be an actual risk to health and safety before the minister can take action to remove a product from the market or make other changes.