Section 232 Copper Smelt and Cast Reporting Effective July 30 2026: The T-1 Filing Playbook

At 12:01 AM Eastern Time on July 30 2026, CBP begins enforcing mandatory country-of-smelt and country-of-cast reporting on four HTSUS subheadings in the insulated copper wire family: 8544.42.10, 8544.42.20, 8544.42.90, and 8544.49.10. Every entry summary line filed on these codes from that instant forward must include the two required fields plus an optional secondary smelt field.

For importers whose SKUs land on any of these four subheadings, the T-1 checklist below is what to run today and first thing tomorrow.

What the rule actually requires

CBP Cargo Systems Messaging Service bulletin 69252300 (July 15 2026) is the operative guidance, superseding the initial notice at CSMS 68855869 (June 5 2026). Both bulletins live at content.govdelivery.com under the USDHSCBP accounts path.

Three data fields on each covered entry line:

1. Primary country of smelt (required, two-letter ISO country code)
2. Country of cast (required, two-letter ISO country code)
3. Secondary country of smelt (optional where a mixed-origin melt is documented)

The fields apply to entries from all origins except the United States. Domestic (US-origin) copper content on the same subheadings does not need the fields, though the entry summary line itself remains classified normally.

The OTH placeholder and its limits

When any of the three fields is unknown at filing time, the importer may report OTH (other). This is a legal placeholder that CBP built into the guidance to avoid stalling entries when the mill certificate or supplier documentation does not identify the smelter or cast facility.

Two things to understand about OTH:

First, OTH is a records-audit flag. CBP has signaled that records-verification patterns under 19 USC 1509(a) will target OTH-filed entries in the enforcement period after initial rollout. Importers who systematically file OTH without a documented supplier follow-up trail are inviting a Focused Assessment or Regulatory Audit within 12 to 18 months.

Second, on covered Section 232 derivative subheadings, OTH is treated conservatively. If the operative Section 232 measure charges the 50 percent copper derivative layer when smelt or cast is non-US, an OTH filing is treated as non-US for duty purposes. Only a confirmed US smelt or US cast entry escapes the layer on those subheadings.

How the reporting field stacks with the duty layer

This is where broker teams are inconsistent and where importer audits have caught overpayment.

The smelt/cast reporting field and the Section 232 copper derivative duty layer are related but distinct. The reporting field lives on the entry line and tells CBP where the copper content originated. The duty layer is charged separately based on Chapter 99 headings that apply Section 232 measures to covered derivative products.

For June 2026 Section 232 copper derivative proclamation coverage, the flow is:

1. Broker classifies the product under the 8-digit HS (e.g., 8544.42.90).
2. Broker checks whether the derivative measure applies (varies by copper content threshold and product configuration).
3. If yes, broker files the applicable Chapter 99 heading (9903.82.xx range for copper derivatives) charging the 50 percent layer.
4. Separately, broker enters primary country of smelt and country of cast fields on the entry line.

Filing the wrong ISO code in the smelt or cast field does not automatically change the duty on the entry. It does create records-audit exposure and, if later found through PSC or CBP audit, can trigger a Section 592 penalty for false statement on the entry summary.

T-1 checklist to run today

If your SKUs touch any of the four subheadings, run through these before tomorrow morning:

1. Extract your top 20 copper wire SKUs and confirm classification. If a product currently sits on a non-covered 8544 subheading (say, 8544.60.10 for coaxial cable) but should be on 8544.42.90, this is the moment to catch the misclassification. A wrong 8-digit assignment misses both the reporting field and the derivative duty layer.

2. Pull mill certificates for those SKUs. The mill certificate is your primary evidence of country of smelt and country of cast. Ask suppliers for the certificate covering current inventory and next 60-day scheduled arrivals. If the mill certificate does not name the smelt or cast facility, escalate to the supplier's raw material sourcing lead.

3. Confirm your broker's ACE integration. Some ABI vendor tools were still catching up as of mid-July. Ask your broker in writing: "Are your ACE ABI entry filing templates updated to accept the primary country of smelt, country of cast, and secondary country of smelt fields for CSMS 69252300 compliance, and will your first-pass entries on July 30 include those fields?" A yes in writing is your audit trail if a broker file bounces.

4. Set an OTH-filing policy. If you will file OTH on any entry because the mill certificate cannot be secured in time, define the follow-up trigger: within 30 days of the OTH filing, pull the supplier documentation, if the actual smelt or cast country is discovered, file a PSC (post-summary correction) to update the entry line. This is the documented supplier follow-up trail that survives a records audit.

5. Pre-July-30 entry timing. If you have a shipment ready for entry today or Wednesday morning July 29 and the covered subheadings apply, filing before 12:01 AM ET July 30 does NOT exempt you from smelt/cast reporting on that shipment. The rule is entry-date-based, but the reporting requirement was announced with a July 30 effective date on all filings from that instant, regardless of import date. Do not confuse this with an in-transit grace period; there is none.

Worked example: 8544.42.90 copper wire from Chile, 250k USD CIF

Facts: importer records show 250,000 USD CIF entry summary line, product code 8544.42.90 (other insulated electric conductors), copper content 45 percent by weight, smelt facility in Peru (Toromocho), cast facility in Chile (Chuquicamata), destination LAX, entry filed August 5 2026.

Entry summary line, post-July-30 filing:

Duty stack:

Compare to a hypothetical US-smelt-and-cast alternative: the 232 derivative layer drops to zero, and the total lands at 947.40 USD. The 56,250 USD delta is a hard number, and it turns on the smelt and cast fields being filled correctly on the entry line.

Records retention pattern

Every entry filed with smelt and cast fields (or OTH) generates a records-retention obligation under 19 CFR 163.4 for five years from date of entry. Documentation to retain:

• Mill certificate identifying smelter and casting facility
• Supplier declaration or attestation letter (if mill certificate names a broad region rather than a specific facility)
• Any PSC filed to correct an initial OTH entry
• Purchase order and commercial invoice tying the mill certificate lot number to the entered shipment

Store these against the entry number in your customs records file, not against the PO number, so an audit request under 19 USC 1509 can be answered quickly.

Where this fits in the broader copper regime

The June 2026 Section 232 copper derivative proclamation is the current umbrella measure. The July 30 reporting requirement is the enforcement mechanism that lets CBP verify who is actually paying the 50 percent derivative layer versus who is claiming US-smelt-or-cast exemption. Expect enforcement pattern data to surface in CBP's Q4 2026 CSMS bulletins on Section 232 audit findings, similar to the aluminum smelt/cast enforcement wave in 2025.

For adjacent lanes (China copper, Chile copper, Peru copper, DRC copper), the reporting field creates an origin-transparency layer that connects to Section 301 forced-labor Chapter 99 headings for entries where the underlying copper originated in a Tier 2 country. Multi-layer stacking is possible on borderline products.

Citations

• CSMS 69252300 (July 15 2026): https://content.govdelivery.com/bulletins/gd/USDHSCBP-420b4cc
• CSMS 68855869 (June 5 2026): https://content.govdelivery.com/accounts/USDHSCBP/bulletins
• CBP Section 232 aluminum and steel FAQs: https://www.cbp.gov/trade/programs-administration/entry-summary/232-tariffs-aluminum-and-steel-faqs
• HTSUS Chapter 99 subheadings 9903.82 (copper derivatives): https://hts.usitc.gov
• 19 USC 1509 (records maintenance): https://www.law.cornell.edu/uscode/text/19/1509
• 19 CFR 163.4 (records retention period): https://www.ecfr.gov/current/title-19/chapter-I/part-163