Colo. Rev. Stat. § 1-13.5-407
Before any votes are taken at any local government election, the election judges shall make a self-affirmation substantially in the following form:
I, ...., do solemnly swear (or affirm) that I am a citizen of the United States and the state of Colorado; that I am a registered elector in Colorado; that I will perform the duties of election judge according to law and the best of my ability; that I will studiously endeavor to prevent fraud, deceit, and abuse in conducting the same; that I will not try to ascertain how any elector voted, nor will I disclose how any elector voted if, in the discharge of my duties as judge, such knowledge shall come to me, unless called upon to disclose the same before some court; and that I will not disclose the result of the votes until the polls have closed.
C.R.S. § 1-13.5-407