Colo. Const. art. V, § 8
No senator or representative shall, while serving as such, be appointed to any civil office under this state; and no member of congress, or other person holding any office (except of attorney-at-law, notary public, or in the militia) under the United States or this state, shall be a member of either house during his continuance in office.
Source: Entire article added, effective August 1, 1876, see L. 1877, p. 38. L. 74: Entire section amended, p. 449, effective January 1, 1975.
Editor's note: The Governor's proclamation date in 1974 was December 20, 1974.