[IBR-160-OM] - Seller country code (IBT-040) MUST not be'OM' if Invoice transaction type (BTOM-001) is Import of services for RCM (XXXXXXXX1XXXXXXXXXXX).
IBR-160-OMubl:Invoice | cn:CreditNotenot($isImportRCM) or cac:AccountingSupplierParty/cac:Party/cac:PostalAddress/cac:Country/cbc:IdentificationCode != 'OM'