If seller is icelandic then it shall contain his address with street name and zip code — Ef seljandi er íslenskur þá skal heimilisfang seljanda innihalda götuheiti og póstnúmer (BT-35 og BT-38).
ubl-creditnote:CreditNote[$SupplierCountry = 'IS'] | ubl-invoice:Invoice[$SupplierCountry = 'IS']exists(cac:AccountingSupplierParty/cac:Party/cac:PostalAddress/cbc:StreetName) and exists(cac:AccountingSupplierParty/cac:Party/cac:PostalAddress/cbc:PostalZone)