Iowa Code Title VIII. Transportation [Chs. 306-330B] § 326.1. Policy

It is the policy of this state to promote and encourage the fullest possible use of the state's highway system by authorizing the negotiation and execution of motor vehicle reciprocity agreements. Apportioned registration shall be conducted in accordance with the international registration plan with respect to vehicles registered in this and other jurisdictions, thus contributing to the economic and social development and growth of this state.