Colo. Rev. Stat. § 24-33.5-415
In addition to and apart from any other appointment provisions of this part 4, the director, with the approval of the appropriate law enforcement agency or agencies, may appoint peace officers of law enforcement agencies outside the bureau as temporary agents of the bureau. Such temporary agents shall have all the powers, protections, defenses, and immunities provided by statute or otherwise to agents of the bureau. Such temporary agents, if from outside the state personnel system, shall not have the protection of tenure afforded by part 1 of article 50 of this title to certified employees. Except for overtime payments authorized by the bureau, the compensation of temporary agents shall not be paid out of state funds allocated to the bureau. During such special assignments as temporary agents, the compensation and employment benefits of such temporary agents shall continue to be paid by their employing law enforcement agencies. The bureau may pay the reasonable expenses of such temporary agents pursuant to the same criteria it uses to pay the reasonable expenses of agents of the bureau. The bureau, upon request by the employing law enforcement agencies of such temporary agents and prior to any such temporary appointment, shall provide the employing law enforcement agencies with a statement detailing the expenses, if any, of such temporary agents that will be the financial responsibility of the employing law enforcement agency and those that will be the financial responsibility of the bureau.
C.R.S. § 24-33.5-415