Idaho Code § 72-322
The director of the department of insurance, after consultation with sureties authorized to issue worker's compensation policies and guaranty contracts in this state, may put into effect a reasonable system for the equitable apportionment among such sureties of applicants for such policies or guaranty contracts who are in good faith entitled to but are unable to procure the same through ordinary methods. Such system shall be so drawn as to guarantee that such an applicant, if not in default on worker's compensation premiums, shall, following his application to the assigned risk system and tender of required premium, be covered by worker's compensation insurance or his coverage guaranteed. When any such system has been approved, all such carriers shall subscribe thereto and participate therein. Assignment shall be in such manner that, as far as practicable, no surety shall be assigned a larger proportion of compensation premiums under assigned policies during any calendar year than that which the total of compensation premiums written in the state by such surety during the preceding year bears to the total compensation premiums written in the state by all such sureties during the preceding calendar year. Provided however, that domestic reciprocal insurers which insure only worker's compensation risks shall be exempt from participation in this system. Premium charges for the assigned risk plan shall not be excessive, inadequate, nor unfairly discriminatory and shall produce sufficient revenue to make the plan self-sustaining and self-supporting.
Idaho Code § 72-322