[ibr-044]-Each self-billed invoice line charge (ibg-28) MUST have a self-billed invoice line charge reason (ibt-144) or a self-billed invoice line charge reason code (ibt-145).
ibr-044cac:AllowanceCharge[cbc:ChargeIndicator = true()]exists(cbc:AllowanceChargeReason) or exists(cbc:AllowanceChargeReasonCode)