Rules/EN 16931/Error

BR-O-01

Peppol BIS Billing 3.0.21

An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is "Not subject to VAT" shall contain exactly one VAT breakdown group (BG-23) with the VAT category code (BT-118) equal to "Not subject to VAT".

This rule has no plain-English explanation of our own yet. The official text above is exact.