SIOUX CITY — A new order by the Iowa Supreme Court enables each county to seek to allow guns in public areas of courthouse floors that are not totally occupied by the court system.The order could alter the dynamics of courthouse security in Iowa, particularly in Woodbury County where it has been a thorny issue among politicians.Iowa Supreme Court Chief Justice Mark Cady issued a two-page supervisory order Tuesday, updating his order of June, issued 12 days before an expanded gun rights bill took effect.Cady’s new order says that there can be a way for weapons to be carried on floors without court system elements.