Iowa Code § 124E.18: Reciprocity.

A valid medical cannabidiol registration card, or its equivalent, issued under the laws of another state that allows an out-of-state patient to possess or use medical cannabidiol in the jurisdiction of issuance shall have the same force and effect as a valid medical cannabidiol registration card issued pursuant to this chapter, except that an out-of-state patient in this state shall not obtain medical cannabidiol from a medical cannabidiol dispensary in this state.