Kwan Unification
On January 8, 1977, nine of the largest kwans unified, recognizing the Kukkiwon as being the black belt promotional body for Taekwondo. Prior to this declaration, many practitioners had considered their individual kwan certifications as being more valuable than the certificates which were issued by the Kukkiwon or KTA. The WTF replaced kwan names with serial numbers. The kwan serial numbers are as follows: (1) Song-Moo-Kwan, (2) Han-Moo-Kwan, (3) Chang-Moo-Kwan, (4) Moo-Duk-Kwan, (5) O-Do-Kwan, (6) Kang-Du-Kwan, (7) Jung-Do-kwan, (8) Ji-Do-Kwan, and (9) Chung-Do-Kwan.
Read more about this topic: Song Moo Kwan