The distinction turns on the article's primary use context. A tray or organizer marketed and designed for office use — holding papers, pens, or files — is generally classified under 3926.10. An identical article sold as a general household organizer may fall under 3924.90. Packaging, marketing materials, and product specifications all serve as evidence of intended use in a CBP classification analysis.

Standard country-of-origin marking under 19 U.S.C. § 1304 applies — the article or its packaging must be legibly marked with the country of origin. No additional agency admissibility review is required for plastic rulers or protractors. However, items marketed specifically for children may be subject to CPSC safety standards under the Consumer Product Safety Improvement Act.