In 1973 the club acquired the status of an official UNESCO club.
The activities were carried out under the patronage of the UNESCO Director-General, Mr. René Maheu, who personally sparked the idea for the club’s logo. The ceremony and the act of declaring the organization a UNESCO club were officially published in the approved final UNESCO programme documents.
In 1991, after an official recommendation from the Bulgarian National Commission for UNESCO, NCSE-UNESCO added to its name the “national” status (prior to that, the organization was known as a Scientific UNESCO Club) and ultimately became the official representative of the UNESCO Clubs Association in all international relations.
Since 1981 NCSE-UNESCO is a founder member and represents the Republic of Bulgaria in the World Federation of UNESCO Clubs, Centres and Associations (WFUCA) and since 2001 – in the European Federation of UNESCO Clubs, Centres and Associations (EFUCA).