This occurred when the National Biathlon Union in London/Heathrow decided to exclude biathlon from the World federation UIPMB (Union de Pentathlon Moderne et Biathlon), which it had been part of since 1953,[2] forcing biathlon to form their own international federation. During the congress the new federation elected their executive committee and the 57 existing members of the UIPMB were automatically transferred to the IBU. However the International Olympic Committee (IOC) did not recognise the IBU as an international Olympic winter sport federation until August 1998.