The World Customs Organization (WCO) has welcomed the decision of the Universal Postal Union (UPU) to make its security standards mandatory for its 192 member countries, thereby establishing a legal basis for the provision of advance electronic data on postal items to Customs and aviation security authorities. This was the outcome of the UPU’s 25th Congress, which took place in Qatar from 7-11 November 2012. The UPU’s decision will facilitate ongoing efforts by the WCO, the International Civil Aviation Organization (ICAO), the International Air Transport Association (IATA) and the UPU to bolster the international supply chain by securing the air cargo sector, following attempts comprise aviation security in 2010.