Great, let's put the whole peace dividend into designing the perfect piece of legal boillerplate that will satisfy every archer's conception of what enough bow is.

If you have a 35 pound bow that isn't any good, don't use it. If you have a 50 pound compound that isn't a humane set-up with a 9 blade expanding broadhead, don't use it.

There are 40 pound hickory selfbows that will passthrough a deer easily. Fiberglass has a lower stiffness to weight ratio than wood, and doesn't produce a harder hitting bow. There are circumstances where glass may outperform, but it isn't always the result.

There probably shouldn't be a cut-off, but if there is going to be one, it might as well be the lowest level that makes sense, not the highest, or you can kiss off a lot of smaller stature folk.