Sigma-Tau Healthscience, Inc. v. United States
838 F.3d 1272
Fed. Cir.2016Background
- Sigma-Tau imported two stabilized L-carnitine products (L-Tauro and GlycoCarn) sold as nutritional supplements; Customs classified them under HTSUS 3824.90.92 (5% duty).
- Sigma-Tau protested, arguing the products are vitamins and should be classified duty-free under HTSUS heading 2936.29.50 ("Vitamins").
- The Court of International Trade (CIT) held the products were prima facie classifiable both as vitamins (2936) and as quaternary ammonium salts (2923), and, applying GRI 3, preferred the more specific 2923 classification.
- On appeal, the government conceded GRI 3 was misapplied and that Chapter Note 3 of Chapter 29 controls when an item fits multiple headings in Chapter 29 (classify under the highest numerical heading).
- The dispute narrowed to whether carnitine (and the stabilized products) is prima facie classifiable as a "vitamin" under HTSUS heading 2936; undisputed scientific evidence showed neonates require exogenous carnitine because endogenous synthesis is insufficient.
- The Federal Circuit held carnitine is a vitamin for neonates, so under Chapter Note 3 the products are classifiable under 2936.29.50 (duty-free); the CIT's grant of summary judgment for the government was reversed and the case remanded.
Issues
| Issue | Plaintiff's Argument (Sigma-Tau) | Defendant's Argument (U.S./Customs) | Held |
|---|---|---|---|
| Whether imported stabilized L-carnitine products are classifiable as "vitamins" under HTSUS heading 2936 | Carnitine is a vitamin (aka "vitamin Bt"); neonates and certain infants require exogenous carnitine, so it meets the common definition of a vitamin | Carnitine is not a vitamin because it can be synthesized endogenously; stabilized formulations should be classified in their imported form | Held: carnitine is prima facie classifiable as a vitamin because neonates cannot synthesize sufficient amounts; stabilizers do not exclude classification under 2936 (Note 1(f)) |
| Whether the presence of stabilizers prevents classification as a vitamin | Stabilizers are incidental; the active ingredient (L-carnitine) determines classification | Customs argued classification must consider the product in imported condition (including stabilizers) | Held: Parties agreed product is classified based on active component; Chapter Note/Note 1(f) permits compounds with necessary stabilizers to be classified as vitamins |
| If merchandise is prima facie classifiable under both 2923 and 2936, which heading applies | N/A — Sigma-Tau relied on Chapter Note 3 to favor 2936 | Government initially relied on GRI 3 to favor 2923 but conceded Chapter Note 3 applies | Held: Chapter Note 3 controls (classify under the heading occurring last numerically in Chapter 29), so 2936 applies if prima facie vitamin |
| Proper definition of "vitamin" for HTSUS purposes | Include compounds essential for normal function in any population (including infants); vitamins are organic micronutrients the body cannot produce in sufficient amounts | Limit "vitamin" to compounds not synthesized by the human body in adequate amounts for normal function (government largely agreed; disputed adult vs. infant scope) | Held: Adopted common scientific meaning: organic micronutrients essential for normal physiological function that the body cannot generally produce in sufficient amounts; includes compounds essential for neonates (conditionallly essential) |
Key Cases Cited
- Deckers Corp. v. United States, 532 F.3d 1312 (Fed. Cir.) (reviews HTSUS interpretation de novo; distinguishes law/fact steps in classification)
- Bausch & Lomb, Inc. v. United States, 148 F.3d 1363 (Fed. Cir.) (where no genuine dispute over merchandise, ultimate classification is question of law)
- BenQ Am. Corp. v. United States, 646 F.3d 1371 (Fed. Cir.) (Section and Chapter Notes are statutory law and binding)
- Len-Ron Mfg. Co. v. United States, 334 F.3d 1304 (Fed. Cir.) (eo nomine provisions and use of common/dictionary meaning when tariff term not defined)
- Rubie’s Costume Co. v. United States, 337 F.3d 1350 (Fed. Cir.) (Explanatory Notes are non-binding but probative guides)
- Archer Daniels Midland Co. v. United States, 561 F.3d 1308 (Fed. Cir.) (Explanatory Notes are not controlling)
- Del Monte Corp. v. United States, 730 F.3d 1352 (Fed. Cir.) (proper classification requires construing schedule terms then deciding which provision applies)