No conveyances or plats of additions to any city or subdivision of any lands lying within or adjacent to any city in which streets and alleys and other public grounds are sought to be dedicated to public use, or other conveyances in which streets and alleys are sought to be conveyed to such city, shall be so entered, unless such conveyances, plats, or other instruments have endorsed thereon the approval of the council of such city, the certificates of such approval to be made by the city clerk.
Iowa Code § 558.65
Referred to in §331.508
Plats, see also chapter 354