WTF Competition Rules
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Article 22. Assignment of Officials
1. Composition of Refereeing Officials
  A. In the use of non-electronic trunk protector: The officials are composed of one referee and three judges.
  B. In the use of electronic trunk protector: The officials are composed of one referee and two judges.
2. Assignment of Refereeing Officials
  A. The assignment of the referees and judges shall be made after the contest schedule is fixed.
  B.

Referees and judges with the same nationality as that of either contestant shall not be assigned to such a contest. However, an exception shall be made for the judges when the number of refereeing officials is insufficient as the case may be.