IMDS for Trucks in USA as a requirement

Hi all, I would like to know about the obligation of OEM Truck companies to require IMDS to their suppliers, I know IMDS is applicable for vehicles under 3.5 Tonnes, but for Trucks over this weight? Which is the standard or environment law that exclude them to comply IMDS, all of this is about Trucks sold in USA, I know that Trucks sold in EU must comply IMDS

Please suggest some readings

Best regards

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