The International Union of Speleology (UIS) is the international body for caving and speleology http://www.uis-speleo.org/
Formed in 1965, its voting members consist of a delegate from each member country. This delegate represents the country’s cavers and speleologists, rather than its national body(s).
An elected Bureau runs the affairs of UIS between the 4-yearly General Assemblies held at the International Congresses. The actual speleological work of UIS is done by the members of its Commissions and Working Groups, which are open to everyone who is interested.
The Artificial Cavities Commission is a part of the Department of Scientific Research UIS
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Artificial Cavities Commission 