Idaho Code § 67-1227
At the request of an agency, the state treasurer is hereby authorized to accept for investment the moneys of an Idaho agency or moneys held in trust by an Idaho agency that are not idle moneys subject to investment under section 67-1210, Idaho Code. The state treasurer may invest the moneys submitted for investment under this section in any investment the treasurer is authorized by law to acquire using the idle moneys of the state of Idaho. The state treasurer may pool moneys submitted for investment under this section with moneys invested by the state treasurer under any program authorized by this chapter. The treasurer may require the agency to certify its authority to submit the moneys for investment by the state treasurer and its authority to invest the moneys in the investments authorized by this section. The costs of investing moneys pursuant to this section shall be paid from the moneys invested or the earnings on such moneys or from a fund designated in advance by the agency.
Idaho Code § 67-1227