The aggregate gross weight of all hazardous materials on a vehicle is 1,200 lbs. The load consists of several different classes, none of which require placards on their own. What must the driver do?

1. Nothing, as no single class exceeds the placarding threshold
2. Apply the 'DANGEROUS' placard
3. Placard for each individual class present in the load
4. Consult the segregation table to determine which placard to use