Writstbands for player/officials

[voiceofcolumbia]

Are there any charitable wristbands (i.e. the camo bands for the troops) that are permissable for players to wear.

Same question for officials. I have two I normally wear (a liveSTRONG and for U of Michigan's children's hospital MGoBlueforMOTT's) that are both solid colors (if that matters at all). Would I be able to wear those or not. If it makes a differnce from state-to-state, I am a Michigan official.