Chapters 165 through 169 of this Code of Ordinances shall be known and may be cited and referred to as the Zoning Regulations of the City of Waukee, Iowa, and may be referred to in these chapters and elsewhere in this Code of Ordinances as “the zoning regulations” or “the zoning ordinance.” In their interpretation and application, the provisions of these zoning regulations shall be held to be minimum requirements. Where any zoning regulation imposes a greater restriction than is imposed or required by other provisions of law or by other rules or regulations or ordinances, the provisions of these zoning regulations shall control. If any other statute, ordinance, or regulation imposes higher standards than are required by these zoning regulations, such statute, ordinance or regulation shall control. Any regulation adopted under the authority of these zoning regulations which relates to a structure, building, dam, obstruction, deposit, or excavation in or on the floodplains of a river or stream shall require prior approval of the Iowa Department of Natural Resources and the U.S. Army Corps of Engineers to establish, amend, supplement, change, or modify such regulation or to grant a variation or exception from it.