French Federation of Speleology 10 years, named the "Bulletin of the CNS". Simultaneously, the SSF ceased publication of its periodical bulletin to provide its official information bulletin in the new "CNS". From 1952, cave training courses were organised in partnership with the Ministry of Youth Affairs and Sports. From 1953, Guy Lavaur organised cave diving activities. In conjunction with the Fédération nationale de sauvetage (National Rescue Federation), a certificate of first degree fitness was created in 1954. The first International Congress of Speleology was held in Paris from 7–12 September 1953 under the patronage of the Minister of National Education, as well as the
French Federation of Speleology was particularly active, and saw the first Bulletin of the CNS take the name of "Spelunca" (4th series), under the double patronage CNS-SSF. After their respective general assemblies on 25 and 26 November 1961, the (CNS) and the (SSF), decided to create a joint commission covering all of caving and speleology. After a consultation of cavers on 1 June 1963, at the national convention of Millau, the CNS and SSF assembled to form the French Federation of Speleology (FFS). On 3 June 1963, the new board elected the first office of the federation, which was composed of: The FFS then