taekwondo1-4, Exercise 1: The three bodies

Model answer:

ITF: international Taekwon-Do organisation; promotes the art, coordinates tournaments and seminars, sets standards for patterns, sparring and destruction (breaking), certifies rank. Founded 22 March 1966 in Seoul by Choi Hong-hi (ITF article).
Kukkiwon: "central institution and the highest technical authority of Taekwondo"; regulates and certifies instructors and manages Dan ranks; also World Taekwondo Headquarters. Building and organisation officially renamed "Kukkiwon" on 6 February 1973 (Kukkiwon article; the Taekwondo article says 1972).
World Taekwondo (formerly WTF): international federation governing the sport of taekwondo and para taekwondo. Established 28 May 1973 at the Kukkiwon with 35 representatives.

"Defined by the Kukkiwon, not the WT": Kukkiwon-style taekwondo is often called WT-style, sport-style or Olympic-style, but the style itself (the techniques and syllabus) is defined by the Kukkiwon. WT runs the sport, whose competitions use only a subset of those techniques.

Sources: Wikipedia, International Taekwon-Do Federation; Kukkiwon; World Taekwondo; Taekwondo.