You missed the stuff before that page. It really is very clear and the language used is identical to that of every CMV manual I've ever seen:

CDL Classifications You should get your CDL for the class vehicle you plan to drive plus you ma... Login to read more.

iATN Members:
Login to read this message and participate
Auto Repair Pros:
Join iATN to read this message and others
Vehicle Owners:
Find a nearby iATN member to repair your vehicle