In 1972, General Choi Hung Hi moved to Toronto, Canada making it the new home of the ITF Headquarters. This worked for awhile, but General Choi was isolated there with no major financial support. Canada being a low-density area, a more centrally located venue for the ITF headquarters was needed to be able to reach as many people as possible.
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In the late 1970s, early 1980s, some changes were made to the pattern set and some fundamental technical approaches which precipitated philosophical conflicts and resulted in the departure of a number of Grand Masters from the ITF. Among them was Grand Master Park Jung Tae who went on to set up his own Taekwon-Do system, the Global Taekwon-Do Federation (GTF). Meanwhile General Choi continued to successfully advance the ITF, spreading it around the world.
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In 2001 General Choi's son, Master Choi Jung Hwa, was voted the successor to the ITF presidency, but the succession was subsequently overturned by General Choi. Believing himself to be the duly elected president, Master Choi Jung Hwa moves to Canada and sets up headquarters there. This ITF becomes known as ITF-C (for Canada).
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In the meantime, General Choi was diagnosed with cancer and in his last Will, that he dictated in front of numerous Grand Masters, he named Mr. Chang Ung as the ITF president. Mr. Ung was a basketball player, with no Taekwon-Do experience, but he was a member of International Olympic Committee. General Choi's intent was that Mr. Ung could use his influence to have ITF Taekwon-Do replace WTF Taekwondo in future Olympic competitions.
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This caused huge controversy and on June 15, 2002 when General Choi Hong Hi passed away, the issue of the ITF presidency had not been resolved. In the confusion the Vice President of the Vienna based ITF (now known as ITF-V) had declared himself the Interim President of the ITF-V. Meanwhile, General Choi's son, Master Choi Jung Hwa, continued his assertion as president of ITF-C (the suffix initials of V and C were added as a way of distinguishing to which ITF system was being referred).
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In addition to ITF-C and ITF-V, Mr. Chang Ung became president of what became known as ITF-NK (for North Korea) splitting the ITF into three separate organizations. Wishing to follow his teacher and founder of the art's wishes, Grand Master Hwang Kwang Sung followed Mr. Chang Ung and supported him as the ITF-NK President.
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By early 2004 however, for philosophical reasons, Grand Master Hwang left the ITF-NK. At this point, the UITF (Unified ITF) was formed with Grand Master Hwang as its president. It was so named for Grand Master Hwang's desire to encourage the reunification of all Taekwon-Do as the General had wished to see it and Korea reunited.