Colorado Revised Statutes Title 1. Elections § 1-11-302. Causes of special legislative election

(1) The state senate or the state house of representatives, acting by resolution, may call a special legislative election for a state senate or house of representatives district following any general election pursuant to this part 3 if:

(2) Such resolution shall direct the secretary of state to give notice to the county clerk and recorder of each county in which such district is located to call a special legislative election for the entire district pursuant to section 1-11-303. Such resolution shall further specify that the candidates at such election shall, subject to the withdrawal of a candidate pursuant to section 1-11-306, be the same as the candidates on the ballot in such district for the state senate or the state house of representatives seat at the preceding general election from which the election contest arises.