# BR-CL-11

> Any registration identifier identification scheme identifier MUST be coded using one of the ISO 6523 ICD list.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/br-cl-11

## Official rule text

Any registration identifier identification scheme identifier MUST be coded using one of the ISO 6523 ICD list.