The Pest Control Products Act actually tries to do it. Now, I'm not a fan.... The act is fairly new. It's newer than CEPA. The problems with the act are mostly about lack of implementation, but if you look at section 19 of the Pest Control Products Act, you'll see that in subsection 19(2) there's actually some wording where they try to turn the assessment of pesticides towards looking at windows of vulnerability. They do it by adding in external factors of safety, so they talk about infants and children, and they talk about “threshold” effects.
I would encourage the agency to maybe look at that act a bit and see what it has done. It was redrafted in 2002.