If the person so authorised as aforesaid certifies that such samples do consist of volatile petroleum the Director of Finance and Planning shall communicate a copy of such certificate to the owner of the petroleum from which such samples have been taken and such petroleum is considered to all intents and purposes to be volatile petroleum within the meaning of this Act and is liable to be forfeited and seized by the Director of Finance and Planning and disposed of under the provisions of section 3. However if sufficient evidence is produced to satisfy the Director of Finance and Planning that the petroleum was purchased or received on consignment by the party holding it in bond in ignorance of the fact that it was under the required test he or she is permitted to export the same provided he or she does so within 60 days from the date that the same is tested otherwise such purchaser or consignee is not entitled to the benefits of this paragraph.