Transporting poisons or inhalation hazards in the cab or sleeping berth is acceptable when?

Division 2.3 (poisonous gas) or Division 6.1 (poisonous) materials:
Never transport these materials in containers with interconnections. Never load a package labeled POISON, POISON-INHALATION HAZARD or POISON GAS in the driver's cab or sleeper berth. Except for poison materials (6.1) marked or labeled as PGIII, never transport a package labeled POISON or POISON INHALATION HAZARD with foodstuffs or edible materials for human or animal consumption.