C.R.S. § 1-13.5-404

With each certificate of appointment transmitted to the election judges, the designated election official shall enclose a form for acceptance of the appointment. Each individual appointed as an election judge may file his or her acceptance form in the office of the designated election official within seven days after the date that the designated election official mailed the certificate of appointment and the acceptance form. Unless otherwise determined by the designated election official, failure of any person appointed as an election judge to file an acceptance within those seven days results in a vacancy, which shall be filled in the same way the original appointment was made.