Some articles on iwta:

Wing Tsun - Organization and Growth
... The official umbrella organization for WingTsun, the International WingTsun Association (IWTA), is headquartered in Hong Kong and led by Leung Ting ... The IWTA has schools in over 60 countries, and has gained a large following in the western world ... With over 1,000,000 practitioners worldwide, the IWTA is currently one of the largest martial arts organizations in the world ...