Iowa Code § 306.25: Execution of conveyance.

If a sale of land in connection with a primary road, state park road, or institutional road has been authorized as provided in this chapter, written conveyances containing the conditions as prescribed by the controlling state agency shall be made in the name of the state and signed by the governor and secretary of state, with the great seal of the state of Iowa attached. If a sale of land in connection with a secondary road has been authorized by the board of supervisors as provided in this chapter, written conveyances containing the provisions prescribed by the board of supervisors shall be made in the name of the county and signed by the chairperson of the board of supervisors and the county auditor.