HS Classification Drift Across the Invoice, Shipping Bill and COO

Each of the three documents resolves its HS code from a different master, at a different granularity, under different constraints — which is why agreement never happens by default. The Shipping Bill is the strictest: its RITC field carries the eight-digit import tariff classification code (CBIC Circular 51/2003-Customs), resolved in the CHA's EDI software at filing time, and it is the code on which assessment, incentive scrolls and export-control screening run. The commercial invoice is the loosest: Indian accounting software carries HSN masters seeded for GST purposes, frequently at four or six digits, and the printed invoice reproduces that master unexamined. The Certificate of Origin sits in between: issued at six or eight digits depending on the agreement and the issuing body, and — decisively — bound to the origin criterion declared alongside it.

The legal frame over all three is the Customs Tariff Act, 1975 and the General Rules for the Interpretation of its First Schedule: classification is determined by the terms of the headings and the Section and Chapter Notes (GRI 1), the most specific description prevails (GRI 3(a)), and subheadings compare only at the same level (GRI 6). The GRI answer for a product is single and determinate in principle — the documents drift because nobody runs the rules three times.

A divergent code is not a cosmetic inconsistency; each digit of divergence re-prices the shipment somewhere downstream. Three regimes make the point concrete.

Incentives. RoDTEP resolves at the eight-digit line. In Appendix 4R as notified w.e.f. 01.05.2025, 85076000 (lithium-ion accumulators), 87084000 (gear boxes), 87085000 (drive-axles) and 87089100 (radiators and parts) each carry a different rate — for an EV supply chain whose components genuinely straddle Chapters 85 and 87, the classification decision is the incentive decision. A Shipping Bill code drifted one line from the correct item claims the wrong rate in whichever direction, and over-claim invites recovery while under-claim is money not collected.

Origin. Under CAROTAR 2020, an importer claiming preferential duty must possess Form I origin information before import and retain it for five years (Rule 4); the officer may requisition it on reason to believe the criterion is unmet (Rule 5). The criteria themselves — change of tariff heading (CTH), change of tariff subheading (CTSH), regional value content — are defined relative to classifications. An Indian exporter's COO that declares CTSH against one subheading, sitting beside a Shipping Bill that declares another, hands the destination customs authority a documented reason to doubt the origin claim — and the exporter's buyer bears the duty consequence.

Declaration integrity. Section 113(i) of the Customs Act, 1962 renders export goods liable to confiscation where they "do not correspond in respect of value or in any material particular" with the entry made — and the tariff item is a material particular of the entry, with penalty exposure following under Section 114.

HS reconciliation across documents is not an equality check, because the documents legitimately carry different granularities. The workable standard has two steps. Ancestry: every code on every document must be an ancestor or descendant of one eight-digit item — the invoice's 8507 must contain the Shipping Bill's 85076000; a COO at 850760 must sit on the same lineage. A four-digit invoice heading is acceptable; a different four-digit heading is drift. Authority: exactly one document owns the resolved eight-digit item — the draft Shipping Bill — and every other document is either aligned to it or corrected upstream in its own issuing system before filing.

What reconciliation deliberately does not do is decide the classification. Where the ancestry check exposes genuine ambiguity — a battery management system arguable between 8507 and 8537, a motor assembly between 8501 and 8708 — the resolution is a classification determination made with human review against the GRI and chapter notes, documented so the same answer is given on every subsequent shipment. Final HS classification requires human review; the reconciliation's job is to make sure the question is asked once, before LEO, rather than answered differently by three systems.

TradeWatch runs the ancestry check across the invoice, packing list, Certificate of Origin and draft Shipping Bill as part of its readiness packet, flagging any code off-lineage with a four-state verdict and the tariff-schedule line it would need to be true. Kanan Labs prepares a readiness packet. It does not file Shipping Bills, holds no customs credentials, and does not make final HS determinations — your licensed CHA files, and classification decisions remain subject to human review.