in ink and in printed script.These documents shall measure 210 × 297 mm. The paper used shall be white writing paper, sized, not containing mechanical pulp, and weighing not less than 25 g/m². If the documents have several copies only the top copy, which is the original, shall be printed with the guilloche pattern background. This copy shall be clearly marked as 'original' and the other copies as 'copies'. Only the original shall be accepted by the competent authorities of the Community as being valid for the purpose of export to the Community in accordance with the provision of the Agreement.2. Each document shall bear a standardized serial number, whether or not printed, by which it can be identified.This number shall be composed of the following elements:- two letters identifying the exporting country as follows: SI,- two letters identifying the intended Member State of customs clearance as follows:BL = Benelux,DE = Federal Republic of Germany,DK = Denmark,EL = Greece,ES = Spain,FR = France,GB = United Kingdom,IE = Ireland,IT = Italy,PT = Portugal,- a one-digit number identifying quota year, corresponding to the last figure in the respective year, e.g. 3 for 1993,- a two-digit number from 01 to 99, identifying the particular issuing office concerned in the exporting country,- a five-digit number running consecutively from 00001 to 99999 allocated to the intended Member State of customs clearance.Article 15The export licence and the certificate of origin may be issued after the shipment of the products to which they relate. In such cases they must bear the endorsement 'délivré a posteriori' or the endorsement 'issued retrospectively'.Article 161. In the event of a theft, loss or destruction of an export licence or a certificate of origin, the exporter may apply to the competent Slovenian authorities which issued the document for a duplicate to be made out on the basis of the export documents in his possession. The duplicate of any such certificate or licence so issued shall bear the endorsement 'duplicata' or 'duplicate'.2. The duplicate shall bear the date of the original export licence or certificate of origin.TITLE V ADMINISTRATIVE COOPERATION Article 17The Community and Slovenia shall cooperate closely in the implementation of the provisions of this Protocol. To this end, contacts and exchanges or views, including on technical matters, shall be facilitated by both Parties.Article 18In order to ensure the correct application of this Protocol, the Community and Slovenia offer mutual assistance for the checking of the authenticity and the accuracy of export licences and certificates of origin issued or of any declarations made within the terms of this Protocol.Article 19Slovenia shall transmit to the Commission of the European Communities the names and addresses of the authorities competent to issue and verify the export licences and the certificates of origin, together with specimens of the stamps used by these authorities and specimen signatures of officials responsible for signing the export licences and the certificates of origin. Slovenia shall also notify the Community of any change in this information.Article 201. Subsequent verification of certificates of origin or export licences shall be carried out at random, or whenever the competent Community authorities have reasonable doubt as to the authenticity of the certificate or licence or as to the accuracy of the information regarding the true origin of the products in question.2. In such cases, the competent authorities in the Community shall return the certificate of origin or the export licence or a copy thereof to the competent Slovenian authorities, giving, where appropriate, the reasons of form or substance which justify an enquiry. If the invoice has been submitted, such invoice or a copy thereof shall be attached to the certificate or to the licence or their copies. The authorities shall also forward any information that has been obtained suggesting that the particulars given on the said certificate or licence are inaccurate.3. The provisions of paragraph 1 above shall also apply to subsequent verifications of the declarations of origin provided for in Article 2 of this Protocol.4. The results of the subsequent verifications carried out in accordance with paragraphs 1 and 2 above shall be communicated to the competent authorities of the Community within three months at the latest. The information communicated shall indicate whether the disputed certificate, licence or declaration, applies to the goods actually exported and whether these goods are eligible for export under the arrangements established by the Agreement. The information shall also include, at the request of the Community, copies of all the documentation necessary to fully determine the facts, and in particular the true origin of the goods.Should such verifications reveal systematic irregularities in the use of declarations of origin, the Community may subject imports of the products in question to the provisions of Article 2 (1) of this Protocol.5. For the purpose of subsequent verification of certificates of origin, copies of the certificates as well as any export documents referring to them shall be kept for at least two years by the competent Slovenian authorities.6. Recourse to the random verification procedure specified in this Article must not constitute an obstacle to the release for home use of the products in