Classification of Instructor
The instructors are, in a broad sense, classified into domestic and international. The former are selected from among 4th Dan and above, qualified by their parent domestic association and the latter from among the domestic instructors, appointed upon completion of the qualification tests by the International Taekwon-Do Federation.
Only the international Taekwon-Do instructor is authorized to teach and test the students both overseas and home. He/She can also issue the grade certificate in his name. However degree certificates must be requested from the International Taekwon-Do Federation.
An international instructor can delegate the authority to his assistants to teach. These assistants, however, do not have the power to test.
As a rule:
1st degree can teach up to 5th grade
2nd degree can teach up to 3rd grade
3rd degree can teach up to 1st grade
(Excerpt from Encyclopedia of Taekwon-Do, by Gen. Choi, p. 732)