Mo. Rev. Stat. § 115.109: Oath of challengers and watchers.

Before entering upon his duties, each challenger and watcher shall take the following oath:

I do solemnly swear that I will make no statement nor give any information of any kind tending in any way to show the state of the count prior to the close of the polls on election day.

Sworn and subscribed to before me

this _________ day of _________ , 20_________

__________________

Challenger or Watcher

__________________

Judge of Election