I'm not sure if that needs to be in the Fisheries Act, but perhaps having clearer end requirements for timelines for making these decisions could be under the Species at Risk Act. I think in that situation, species that have been assessed as being at risk are not being listed in it or the decisions aren't being made in a timely manner. This situation is the opposite: The situation has changed, but the previous decision hasn't been undone.
Managing our species at risk can't take decades. By definition, they're in crisis, and these decisions need to be made quickly.