EV drivers using medical cannabis have a legal defence against the 2mcg/L THC...

https://wiki-planet.win/index.php/How_to_Talk_to_Your_Doctor_About_Driving:_A_Guide_for_Patients_on_Prescribed_Medication

EV drivers using medical cannabis have a legal defence against the 2mcg/L THC limit, but fitness to drive is paramount. Legality doesn't replace responsibility; impairment is still a liability