At a Conference held in Mexico City from 17th to 28th September 1970, the statutes of a new universal intergovernmental organisation, The World Tourism Organisation, were drawn up, to become effective and the organisation bought into being 120 days after 51 competent States have signified their acceptance of them. These statutes were drawn up in circumstances which, from a legal point of view, can only be regarded as decidedly unusual. Basically what happened was that the International Union of Official Travel Organisations, IUOTO, an international non-governmental organisation, was attempting to secure a means whereby it could “transform” itself from its private law status into a fully-fledged international intergovernmental organisation, governed by public international law, and this without any break in the continuity of legal personality between the two situations. The story of the metamorphosis of IUOTO makes interestingreading.