Iowa Code § 356A.2: Contract.

If the board of supervisors contracts with a public or private nonprofit agency or corporation for the establishment and maintenance of such a facility, the contract shall state the charge per person per day to be paid by the county; that each facility shall insure the performance of the duties of the keeper as defined in section 356.5; the activities and service to be provided those detained or confined; the extent of security to be provided in the best interests of the community; the maximum number of persons that can be detained or committed at any one time; the number of employees to be provided by the contracting private nonprofit agency or corporation for the maintenance, supervision, control, and security of persons detained or confined in the facility; and any other matters deemed necessary by the supervisors. A contract shall be for a period not to exceed two years. The board of supervisors shall deliver a copy of the contract to each judicial officer of the district which includes that county.