Which column of the 49 CFR 172.101 Hazardous Materials Table lists the hazard warning label(s) that shippers must put on the package?

AAMVA CDL Manual, Section 9.3.3 (nhcdm.pdf p. 9-5); 49 CFR 172.101(g)

Knowing which column to check for required labels lets a driver quickly verify at pickup that a package has the correct diamond-shaped label(s) before it goes on the truck — catching a shipper's labeling mistake before it becomes the driver's violation down the road.