i find stuff like this extremely misleading. CBD made from industrial hemp is considered a dietary supplement by the FDA and iirc is legal in every state. charlottes web is practically just industrial hemp, i believe it comes in under the THC limits
there’s already been precedent set in canada they need more than just cannabis use to prove impairment, although i guess that’s the purpose of setting a ‘limit’ - you aren’t prosecuted for being impaired you’re prosecuted for passing their threshold