Ballroom dance competitions are regulated by each country in its own way. There are about 30 countries which compete regularly in international competitions. There are another 20 or so countries which have membership of the WDC and/or the IDSF, but whose dancers rarely appear in international competitions.^[9] In Britain there is the British Dance Council, which grants national and regional championship titles, such as the British Ballroom Championships, the British Sequence Championships and the United Kingdom Championships. In the United States, amateur dance proficiency levels are defined by USA Dance (formerly United States Amateur Ballroom Dance Association, USABDA).