[IBR-087-OM] - In case Invoice transaction type (BTOM-001) is 'Profit Margin Self-Invoice' (XXXXXXXXXX1XXXXXXXXX), Seller Country Code (IBT-040) MUST be 'OM'.
IBR-087-OMubl:Invoice | cn:CreditNotenot($isProfitMargin) or cac:AccountingSupplierParty/cac:Party/cac:PostalAddress/cac:Country/cbc:IdentificationCode='OM'