Perhaps I could speak to that.
One of the most direct ways the precautionary principle could apply relates to the fact that there are hundreds of substances about which there is very little known information. I'm referring now to the existing substances, those that have been going through this categorization exercise, where government is trying to pull together whatever existing information there is about these substances and looking to see whether they pose a threat. When the information is not available on which to base a decision, the precautionary principle could kick in and determine that these substances need to be controlled, limited, prohibited, eliminated. Or alternatively, the precautionary principle could be used is to say that until information is provided to demonstrate the safety of those substances, they should not be used and risk management measures should be taken to eliminate them.