La. R.S. 33:140.50.11

In the preparation of the master plan, the commission shall make careful and comprehensive surveys and studies of the existing conditions and probable future growth of the municipality and its environs. The plan shall be made with the general purpose of guiding and accomplishing a coordinated, adjusted, and harmonious development of the metropolitan planning area which will, in accordance with existing and future needs, best promote public health, safety, morals, order, convenience, prosperity, or the general welfare, as well as efficiency and economy in the process of development.