Colorado constitution
Article IV
Section 1

(2) In order to broaden the opportunities for public service and to guard against excessive concentrations of power, no governor, lieutenant governor, secretary of state, state treasurer, or attorney general shall serve more than two consecutive terms in such office. This limitation on the number of terms shall apply to terms of office beginning on or after January 1, 1991. Any person who succeeds to the office of governor or is appointed or elected to fill a vacancy in one of the other offices named in this section, and who serves at least oneĀ­ half of a term of office, shall be considered to have served a term in that office for purposes of this subsection (2). Terms are considered consecutive unless they are at least four years apart.