Eligibility depends on the specific statutory provision being invoked. The importer must identify the applicable law or note authorizing duty-free treatment, confirm the article meets all conditions (such as end-use restrictions or user qualifications), and document compliance at entry. A licensed customs broker or CBP binding ruling can clarify whether a particular article qualifies.

Special classification provisions that grant duty-free treatment under Chapter 98 do not automatically exempt goods from trade-remedy measures such as Section 301 tariffs. Whether a trade remedy applies depends on the specific statutory language of the exemption and CBP guidance; importers should verify remedy applicability separately from the duty-free classification.