Colorado Constitution of 1876 Art. VII, § 4. When residence does not change

For the purpose of voting and eligibility to office, no person shall be deemed to have gained a residence by reason of his or her presence, or lost it by reason of his or her absence, while in the civil or military service of the state, or of the United States, nor while a student at any institution of learning, nor while kept at public expense in any asylum, nor while confined in public prison.