PEPPOL-EN16931-CL006fatal
How to fix PEPPOL-EN16931-CL006
Invoice period description code must be according to UNCL 2005 D.16B.
What this rule checks
When an invoice period description code is provided, it must use a value from UN/CEFACT code list 2005 (revision D.16B). This standardizes how the invoicing period is described (e.g. delivery date, payment date, invoice date).
How to fix it
Set cbc:DescriptionCode inside cac:InvoicePeriod to a valid UNCL 2005 D.16B value (e.g. '3' for invoice date, '35' for delivery date, '432' for paid to date).
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