Iowa Code § 484B.8
The department shall prepare transportation tags suitable for use upon the legs of game birds described in this chapter. The tags shall be of a type which are not removable without breaking and mutilating the tag. The tags shall be used to designate all game birds taken by hunters upon a licensed hunting preserve. The department shall provide licensees with the tags. All dead game birds removed from a licensed hunting preserve shall have a hunting preserve tag affixed to one leg prior to being transported from the licensed hunting preserve, except as otherwise provided by rule of the commission. All mallards released for hunting purposes shall be physically marked by the removal of the hind toe from the right foot at not more than four weeks of age, so as to provide for permanent identification. Game bird tags issued to a hunting preserve are not transferable.
Iowa Code § 484B.8
92 Acts, ch 1160, §8