United States law requires every new passenger vehicle to display a label showing the manufacturer's suggested retail price, the standard equipment, the factory options with their individual prices, and the fuel economy and safety ratings.
The label is named after the senator who sponsored the law requiring it. Removing it before the first retail sale is a federal offence.
For a used buyer the value of the original label is that it settles exactly which options a vehicle left the factory with, which is otherwise surprisingly hard to establish years later.
Why it matters
Options materially change value. Knowing whether a car genuinely left the factory with a particular package stops you paying for equipment it never had.
How to check it
The original specification can be reconstructed from the VIN, because the option content is encoded in the build record.
Does this apply to the car you are looking at?
Run the VIN or plate and see what is actually on record.
Related terms
Definitions are general guidance, not legal advice. Title rules, total loss thresholds and inspection requirements are set by each state and change over time, so confirm the position with the motor vehicle agency for the state the vehicle is titled in before relying on it.