[aligned-ibrp-037-aunz]-Each Document level charge (ibg-21) MUST have a Document level charge tax category code (ibt-102).
aligned-ibrp-037-aunz
cac:AllowanceCharge[cbc:ChargeIndicator = true()]
exists(cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID) or not(parent::ubl:Invoice|parent::cn:CreditNote)