The Trade Stack Issue #16 — Section 232 aluminum derivative list revises, Vietnam footwear AD/CVD preliminary rates set, USMCA automotive ROO audit uptick

This Week in Tariffs

1) Section 232 — aluminum derivative list revised

Commerce revised the Section 232 aluminum derivative articles annex this week. The change widens the in-scope basket for finished aluminum articles while carving out a narrow list of value-added products for downstream use. Importers should confirm whether their HTS chapter 76 entries are still in-scope after the latest revision.

Who's affected: Aluminum product importers — extrusions, sheet/stock, and certain finished articles. Source: Commerce / Federal Register notice, May 11, 2026.

2) AD/CVD — Vietnam footwear preliminary rates

Commerce set preliminary antidumping duty rates on Vietnam-origin rubber/plastic footwear (HTS 6402/6404) after the petition finding. Brokers report that importers are pre-staging Section 301 stacking scenarios while waiting for the final determination. Some entries have been flagged with CBP for country-of-origin verification pending the final order.

Who's affected: Footwear importers — Vietnam-origin rubber/plastic footwear under HTS 6402 and 6404. Source: Commerce AD/CVD Access portal, May 2026.

3) USMCA — automotive rules-of-origin audit uptick

CBP has stepped up USMCA preference qualification audits on automotive vehicles, particularly around the regional value content (RVC) calculation and the high-wage material test. Auto-parts importers seeing USMCA preference thresholds need to confirm their RVC workbook and labor value calculations hold up under audit.

Who's affected: Automotive importers and Tier-1/2 parts suppliers using USMCA preference. Source: CBP USMCA audit notices, 2026.

Duty Savings Spotlight

Aluminum extrusions vs. aluminum articles — chapter 76 misclassification risk

Extruded aluminum articles (HTS 7604) versus finished aluminum articles (HTS 7616.99) is a recurring classification error. The duty difference is meaningful:

• HTS 7604.29.50 (aluminum extrusions, worked) — 5.7% MFN + 10% Section 232 (the 10% aluminum rate) if applicable
• HTS 7616.99.51 (other finished aluminum articles) — 3.5% MFN + 10% Section 232 if applicable

How to check: Describe the aluminum article's end-use, manufacturing process, and any further processing required before installation. Verify Section 232 stacking and Section 301 list placement with your broker before entry. The USITC HTS database is the authoritative source.

Run the HTS Classifier →

Compliance Alert

CBP 19 USC 1592 penalty exposure — prior disclosure window

Importers discovering prior classification or valuation errors have a narrowing window for prior disclosure under 19 USC 1592. Filing prior disclosure reduces the maximum penalty from four times the loss of duties to interest-only; missing the window exposes entries to full culpability penalties plus potential criminal referral at the CBP Office of Internal Affairs track. Particularly important for any importer that quietly re-classified lines in 2024–2025 without amendment.

Impact: All importers with any open classification or valuation reconciliation items from prior entries. Source: 19 USC 1592, CBP informed compliance practice.

Quick check: USTradeStack's Compliance Audit Report maps your HTS codes against your actual entries, flags likely variances, and provides a CBP-ready prior disclosure path if needed.

Run the Compliance Audit →

One Tool, One Win — Landed Cost Calculator

Aluminum in particular is running hot — between Section 232 stacking (10% aluminum), Section 301 (China), and any active AD/CVD order. Before you quote a supplier price to your team, run it through this.

1. FOB purchase price + freight + insurance
2. Duty rate by HTS chapter (USITC) + Section 232 stacking
3. MPF + HMF + any active AD/CVD order
4. Total landed cost per unit

Run the Landed Cost Calculator →