If I can interrupt you, what they agreed to, is the department applies the precautionary approach, where appropriate, as a subcomponent within an overall decision-making approach.
This seems to run a bit contrary to public expectation that the precautionary principle should reign supreme. First of all, make sure it's safe before you do anything. Clearly, the risk management regime in place right now isn't capable of determining whether or not these aquaculture operations are safe in and around the wild salmon population.