Local ordinances may present problems to the unwary.
Delaware is an open carry state. Those doing so should be aware that any local ordinances that were in effect at the time that preemption was passed (July 4, 1985) are still in effect and are NOT preempted.
Example: Dover Non-Preempted Ordinance: The City of Dover has a local ordinance which falls outside of the scope of preemption which requires a permit to open or conceal carry. http://deloc.org/