The Board of Trustees hereby declares that the purpose of this article is to accomplish the conservation, protection and preservation of such places, sites, structures, buildings and roadscapes which is authorized by and is in accordance with Article 5, § 96-a, of the General Municipal Law of the State of New York. In addition, the purpose of this article is to promote and protect the health, safety and general welfare of the community by providing a procedure to ensure that places, sites, structures and buildings of special historic or architectural significance, which are of particular importance to the history and heritage of the Village of Old Westbury, the Towns of North Hempstead and Oyster Bay, the County of Nassau, the State of New York or the United States of America, are preserved.