Colorado Revised Statutes Title 1. Elections § 1-12-104. Signatures required for state and county officers

(1) A petition to recall a state or county officer shall be signed by eligible electors equal in number to twenty-five percent of the entire vote cast at the last preceding general election for all candidates for the office which the incumbent sought to be recalled occupies.

(2) If more than one person is required by law to be elected to fill the office to which the person sought to be recalled is an incumbent, then the petition shall be signed by eligible electors entitled to vote for a successor to the incumbent sought to be recalled equal in number to twenty-five percent of the entire vote cast at the last preceding general election for all candidates for the office to which the incumbent sought to be recalled was elected, the entire vote being divided by the number of all officers elected to the office at the last preceding general election.