C.R.S. § 26-2-718

(1) In the event that two or more counties agree to administer and implement the Colorado works program jointly, such counties shall submit resolutions from their boards of county commissioners to the state department that reflect their intention to administer and implement the Colorado works program jointly. (2) The state department shall make a determination to approve or deny the resolutions and notify the counties within thirty days after the receipt of the resolutions. (3) The state department, in conjunction with the boards of county commissioners of the affected counties, shall determine administrative, programmatic, and reporting requirements in connection with the joint operation of the works program by the counties.