Any person responsibly engaged in developing or improving a tract of land which complies with the definition of a subdivision as defined in this Ordinance. Subdivision: The division of a parcel of land into two (2) or more lots, parcels, sites, units, plats or interests for offer, sale, lease or development. Includes the development of land zoned for residential or nonresidential uses. This term does not apply to the following:-The division of land into parcels larger than five (5) acres for agricultural purposes not involving any new streets or easements of access.-The sale or exchange of parcels between adjoining lot owners where such sale or exchange does not create additional building sites.