CBAM validation error: Declaration CN code format

This appears when the submitted text does not match the format required by the versioned rule.

BlockingFix at the source

Educational guide only — this module is not part of the current public offer.

What the check requires

The CN code must be an 8-digit Combined Nomenclature code (digits only, no spaces).

A blocking error — this record cannot pass deterministic validation until it is resolved.

Why this is reported

This appears when the submitted text does not match the format required by the versioned rule. The deterministic CBAM validator reports it as rule cbam.declaration.cn-code-format. The requirement and citation come from versioned profile 1.0.3; Clearlane does not replace them with an AI-generated verdict.

How it gets fixed

Correct or re-export the source value in the exact format stated in the rule message. Run validation again. Clearlane never fills a compliance value by guessing.

CitationCombined Nomenclature, Annex I to Council Regulation (EEC) No 2658/87 (8-digit CN subheadings); CBAM goods declared at CN 8-digit levelprofile 1.0.3 · Effective from 2026-01-01 · captured 2026-07-11