---pagebreak--- 29 . 8 . 86 Jornal Oficial das Comunidades Europeias N ? L 245 / 273 PROTOCOL A TITLE I relating to the products to the effect that the products in question originate in Czechoslovakia within the meaning of the relevant rules in force in the Community . CLASSIFICATION Article 1 Article 3 1. The competent authorities of the Community The certificate of origin shall be issued only on application undertake to inform Czechoslovakia of any changes in the having been made in writing by the exporter or , under the Common Customs Tariff or NIMEXE before the date of exporter's responsibility , by his authorized representative . their entry into effect in the Community . The competent governmental authorities of Czechoslovakia shall ensure that the certificate of origin is properly 2. The competent authorities of the Community completed and for this purpose they shall call for any undertake to inform Czechoslovakia of any decisions necessary documentary evidence or carry out any check relating to the classification of products subject to the which they consider appropriate . Agreement within one month of their adoption at the latest. Such communication shall include : ( a) a description of the products concerned ; Article 4 (b ) the relevant category , tariff position or sub-position and the NIMEXE code ; Where different criteria for determining origin are laid down