WTF Competition Rules
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Article 9. Weigh-in
1. Weigh-in of the contestants on the day of competition shall be completed on the previous day of the pertinent competition.
2.

During weigh-in, the male contestant shall wear underpants and the female contestant shall wear underpants and brassiere. However, weigh-in may be conducted in the nude in the case that the contestant wishes to do so.

3.

Weigh-in shall be made once, however, one more weigh-in is granted within the time limit for official weigh-in to the contestant who did not qualify the first time.

4.

So as not to be disqualified during official weigh-in a scale, the same as the official one, shall be provided at the contestants' place of accommodation or at the arena for pre-weigh-in.