the preparation of a document on the lines of the ECS carnet, which could be used to facilitate, in particular, the temporary admission of professional equipment and of goods for display or use at exhibitions, fairs, etc. Since two Conventions concerning the temporary admission of these items were in the course of preparation, it was recognised that it would be highly desirable that the Convention creating the new document should be ready for adoption by the council, at the same time as these Conventions; or as soon as possible thereafter. Hence, due to the ECS Carnet success, in 1961 the Customs Cooperation Council adopted the Customs Convention on the ATA Carnet for the Temporary Admission of Goods (ATA Convention) which then entered into force on 30 July 1963. ATA Carnets are seen as upgraded version of ECS Carnets, which are no longer limited to commercial samples. More specific conventions for each type of applicable good were subsequently worked out and agreed on by the CCC. At its 47th / 48th Sessions (June 1976), the Council recommended Contracting Parties to the Customs Convention Regarding the E.C.S. Carnets for Commercial Samples to denounce it as it duplicates the ATA Convention. To date, 21 countries have deposited their instruments of denunciation of the ECS Convention which, as a result, now has only one Contracting Party (Haiti)."The States signatory to this Convention, convinced that the adoption of common procedures for the temporary duty-free importation of goods would afford considerable advantages to international commercial and cultural activities and would secure a higher degree of harmony and uniformity in the customs system of the Contracting Parties." – (Preamble of the A.T.A. Convention) The Istanbul Convention Between 1950 and 1970, there was a proliferation in the number of international Conventions, Recommendations, Agreements and other instruments on temporary admission, creating confusion for the international business community and complicating the work of Customs. In the early 1990s the WCO decided to take draft a worldwide Convention on temporary admission to combine, into a single international instrument, 13 existing temporary admission agreements, namely: Customs Convention on the ATA carnet for the temporary admission of goods (ATA Convention), Brussels, 6 December 1961 Customs Convention concerning facilities for the importation of goods for display or use at exhibitions, fairs, meetings or similar events, Brussels, 8 June 1961 Customs Convention on the temporary importation of professional equipment, Brussels, 8 June 1961 European Convention