(a) All portions of a lot which are not improved shall be landscaped or maintained in an orderly natural state.
(b) In addition to the aforementioned yard and lot area requirements, a screen of deciduous and evergreen trees and shrubs sufficient to create a year-round visual barrier shall be planted and maintained between any development permitted in a Research Manufacturing District and any adjoining residence district in accordance with the layout plan approval by the City Planning Commission.
(c) All requirements contained in subsection (b) hereof must be fully complied with before a certificate of occupancy is issued by the Building Commissioner.
(Ord. 53-61. Passed 4-17-61.)