2009 Iowa Code
Title 8 - Transportation
Subtitle 1 - Highways and Waterways
CHAPTER 303 - DEPARTMENT OF CULTURAL AFFAIRS
303.68 - CONFLICT WITH OTHER REGULATIONS.

        303.68  CONFLICT WITH OTHER REGULATIONS.
         If the regulations made under this subchapter impose higher
      standards than are required in any other statute or local ordinance
      or regulation, the regulations made under this subchapter govern.  If
      any other statute or local ordinance or regulation imposes higher
      standards than are required by the regulations made under authority
      of this subchapter, that statute or ordinance or regulation governs.
      If a regulation proposed or made under this subchapter relates to a
      structure, building, dam, obstruction, deposit, or excavation in or
      on the flood plains of a river or stream, prior approval of the
      department of natural resources is required to establish, amend,
      supplement, change, or modify the regulation or to grant a variation
      or exception from it.  

         83 Acts, ch 108, § 28