The N70 is calculated more with the idea of protecting the resource, which in this case is the seals. That's where you're minimizing any sort of conservation risk. We do not apply this to grey seals right now. If we did, we would prevent the number of seals dropping below 70% times 250,000. I can't do the math in my head.
On November 9th, 2006. See this statement in context.