Any peace officer of the county under process or warrant to the peace officer directed shall have the right to open any box, barrel, or other vessel or package for examination, if the peace officer has reasonable ground for believing that it contains alcoholic liquor, wine, or beer, either before or while the same is being so transported or conveyed.
Iowa Code § 123.100
2013 Acts, ch 35, §26; 2018 Acts, ch 1060, §50