As used in this chapter, the following terms shall have the meanings indicated:
The Town of Marilla and its departments, divisions, offices, bureaus and boards or commissions created or appointed by the Town Board and any special or improvement district of the Town, other than a library district, a fire district, a district corporation or district having a separately elected governing body.
The same meaning as set forth in Subdivision 4 of § 86 of the Public Officers Law.