The only thing I would add, as Jean-Claude said, is that the recommendations that come forward from the panels and are processed by the agency and put before the government can include anything that falls within the scope of the panel, including, potentially, air emissions.
The government ultimately makes a response to the panel recommendation. But then--and I think this may be the missing piece to answer the question--the federal departments that have to issue an authorization or a permit to allow the project to proceed can include, will include, those conditions in the permitting process. That's the mechanism by which the federal government can actually ensure the implementation of the panel's recommendations.
In the case of the oil sands, in most cases federal involvement is triggered by the requirement, for example, for a Fisheries Act authorization or an authorization under the Navigable Waters Protection Act. So DFO or Transport Canada will include recommendations from the panel that were approved by the government as conditions of authorization, before issuing the permits. That's the tool the government has to ensure the implementation of a panel's recommendations.