The USAT published their 'Equipment Standards' today.

http://www.usa-taekwondo.us/EQUIPMENTSTANDARDS.pdf

It states in there that Mouth guards may be any color. Is this a new rule with the WTF? I thought one of the main purposes of making them clear or white, was for safety (mainly so the center referee could see blood, if present).

What are your thoughts on this? Is this a mistake in publishing, or a change in rule?