Iowa StatutesCHAPTER 306B - OUTDOOR ADVERTISING ALONG INTERSTATE HIGHWAYS306B.1 - DEFINITIONS.306B.2 - ADVERTISING PROHIBITED -- EXCEPTIONS.306B.3 - RULES.306B.4 - PURCHASE OF EXISTING SIGNS.306B.5 - REMOVAL AFTER NOTICE.306B.6 - MISDEMEANOR.306B.7 - FEDERAL AGREEMENTS.306B.8 - FUNDS ACCEPTED.