The Legislature of the State of Alabama declares that it is the public policy of the State of Alabama that a certificate of need program be administered in the state to assure that only those health care services and facilities found to be in the public interest shall be offered or developed in the state. It is the purpose of the Legislature in enacting this article to prevent the construction of unnecessary and inappropriate health care facilities through a system of mandatory reviews of new institutional health services, as the same are defined in this article.