BR-FXEXT-BR-38
Each Document level charge or tax (BG-21) shall contain a Document level charge or tax reason (BT-104) or a Document level charge reason code (BT-105) or Document level non-VAT tax code (BT-177), or both reason and code.
error: the document is invalid
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
Context
//ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge/ram:ChargeIndicator[udt:Indicator='true']
Test
(../ram:Reason) or (../ram:ReasonCode)
Checked with France Factur-X EXTENDED, Factur-X / ZUGFeRD EXTENDED