Under EPA's TSCA Title VI rule, MDF must be certified by a CARB-approved third-party certifier (TPC) confirming compliance with formaldehyde emission limits. Importers must maintain chain-of-custody documentation linking the certified product to the specific mill and production lot; non-compliant panels are subject to recall and civil penalties.

The US has issued antidumping and countervailing duty orders on MDF from specific countries. Before sourcing, importers should check the current scope of active orders with the US Department of Commerce and CBP, request a scope ruling if the product's specifications are borderline, and factor potential duty deposits into landed-cost models — especially when switching to a new supplier country.