When the intensity of use of any premises is increased through the addition of 25% or more to the floor area or developed lot area, that portion of the premises shall provide the required landscaping in accordance with the provisions of this chapter. When the intensity of use is increased 60% or more, landscaping as required by this chapter shall be provided on the entire developed portion of the property.
('64 Code, § 56.09) Penalty, see § 10.97