When the owner or owners of a tract of land wish to develop or redevelop property in the B-4 Zoning District, such owner, owners or agent thereof shall submit a Site Plan and/or Development Plan for review and consideration as described in Chapter 1109. A Site Plan or Development Plan is not necessary when the proposed actions involve only a change of use in an existing building, and such proposed actions do not involve the provision of additional parking or other exterior building modifications other than signage.