Access to international markets also means that the international carriage of goods proceeds in safe, secure and pollution preventive conditions that are acceptable to all signatory countries; this is the main objective of certain multilateral agreements such as the European Agreement concerning the International Carriage of Dangerous Goods by Road (see also section 5.4), the Agreement on the International Carriage of Perishable Foodstuffs and on the Special Equipment to be Used for such Carriage (see box "Transport of Perishable Foodstuffs" below). In addition, these Agreements contain harmonized requirements accepted by all Contracting Parties and provisions for mutual recognition of certificates, which contribute extensively, to the facilitation of the international transport of such sensitive goods. The Centre is developing a set of e-Business standards including UN/CEFACT XML Message specifications56 and the UN/CEFACT Core Component Library57 which contains information on data and structures used in e.g. the Data Model of the World Customs Organization (UNECE, 2012).