A structure, transportable in one or more sections, which in the traveling mode, is eight body feet or more in width or forty body feet or more in length, or when erected on site, is three hundred twenty or more square feet, and which is built on a permanent chassis and designed to be used as a dwelling with or without a permanent foundation when connected to required utilities, and includes the plumbing, heating, air-conditioning and electrical systems contained therein.
New York Legal Code