You're asked to haul a Division 6.1 Packing Group I Hazard Zone A poisonous liquid in the same vehicle as a Class 3 flammable liquid. Under 49 CFR 177.848(c), is this combination ever legal?

49 CFR 177.848(c)

Hazard Zone A materials are the most acutely toxic-by-inhalation category DOT regulates, meaning even a small release can be lethal over a wide area. The rule treats this class with zero tolerance for co-loading with flammables, corrosives, or reactive materials, because any one of those could trigger the kind of packaging failure that turns a contained shipment into a mass exposure event.