It is difficult to figure out how to trigger a regional assessment when you're looking at cross-boundary effects, and some of our national parks do cross boundaries in this country. You could suggest an ecoregion-based approach, an ecosystem-based approach, or a watershed-based approach. One thing that is glaring, though, is that what we should be looking at is whether a project is going to impact our parks, especially parks that have world heritage status. If they do, then that could be a trigger for a regional assessment.
On April 17th, 2018. See this statement in context.