Actual federal weight law rules, some questions and answers

You're right, Jim. Section 110 specifies the contents of the tag and Section 120 species what tires and rims are required on vehicle so, yes, they are legally binding in that sense. Section 120 uses the definitions in Section 110 for its definitions. I went through the regs fairly quickly but I didn't see anywhere that said that you are not permitted to exceed the GVWR of a vehicle, though.

Bert