Idaho Code § 50-1016
Any city may deduct, upon written approval of the individual employee, sums certain from said employee's salary or wages for the purpose of paying said sums for premiums on group life, health, accident, disability, hospital and surgical insurance, or any other purposes approved by the city council. Any city may pay all or any part of such deductions as approved by the council.
Any city may adopt a city retirement and pension plan for the benefit of its employees and for that purpose may deduct, upon written approval of the individual employee, sums certain from said employee's wages as a contribution to said plan and any city may pay all or any part of such premiums as approved by the council and may make such other contributions as may be required to make such plan actuarially sound. Such plan may be administered by the employer or by a third party organization selected through a competitive selection process. Further, the employer may cooperate with other city or county employers for joint administration of the plan.
Idaho Code § 50-1016