An application to the City Planning Commission for the grant of a special permit respecting any development or enlargement or substantial modification of landscaping or topography to be made within the Special District, shall include the existing and proposed site plan showing the location and the scale of the existing and proposed buildings or other structures, the location of all vehicular entrances and exits and off-street parking facilities, the changes that will be made in the location and size of the open space, and such other information as may be required by the Commission. The submission shall include a landscaping plan, building sections and elevation and an appropriate model of the planned community.