9. Connectivity - globally, United Nations World Tourism Organisation (UNWTO) is constantly campaigning against airport taxes due to their negative impact on tourism. In South Africa, Airports Company South Africa (ACSA) increased tariffs by 5.6 per cent from 1 April 2014 to recoup money for investment. In May 2014, International Air Transport Association (IATA) expressed hope that on-going dialogue with ACSA will prevent high increases in the future.