Platform means the basic structure of a vehicle including, but not limited to, the majority of the floorpan or undercarriage, and elements of the engine compartment. The term includes a structure that a manufacturer designates as a platform. A group of vehicles sharing a common structure or chassis shall be considered to have a common platform regardless of whether such vehicles are of the same type, are of the same make, or are sold by the same manufacturer.


49 CFR § 579.4

Scoping language

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