(a) The City officials concerned with property development shall take into account that it is increasingly difficult to forecast the various conditions and factors that may be encountered in sizeable developments, and that certain latitude, flexibility and freedom in the execution of the design and layout of a project should be suggested or otherwise permitted by the City so as to encourage the developer to adjust the streets to irregular topography; to take advantage of topography in order to utilize the natural surface drainage; to economize in the construction of sewers and storm drainage facilities; to reduce the amount of grading and thus minimize destruction of trees and topsoil; to adjust the layout to geographical and cultural limitations such as property ownership lines; and, among other things, to create architectural variation in the development as well as attractive and usable buildings and building sites; and further, such developments shall be designed so as to enhance the community in general by providing amenities which are unique to the community.
(b) Planned unit developments may be residential, commercial or industrial developments, or they may be combinations of uses, such as residential and commercial, or commercial and industrial. The minimum site area for a residential development shall be six acres; for a commercial development, three acres; and for an industrial development, ten acres. If a combination of uses is proposed, a residential-commercial development shall have a minimum of fifteen acres, and a commercial-industrial development, a minimum of fifteen acres.
(c) Plans for a planned unit development shall be submitted to the Municipality and shall be referred to the Planning Commission for study and conducting of a public hearing by Council. Notice and publication of such public hearings shall conform to the procedures prescribed in Article 1355 for hearings on changes and amendments.