An authorized agency which plans to establish a supervised independent living unit within a municipality must notify the chief executive officer of the municipality in writing of its intentions. Such notice must include a description of the nature, size and the community support requirements, if any, of the unit. For purposes of this subdivision, "municipality" means an incorporated village, if the supervised independent living unit is to be located therein; a town, if the supervised independent living unit is to be located therein and not simultaneously within an incorporated village; or a city, except that in the City of New York, the community board with jurisdiction over the area in which such authorized agency is to be located is considered the municipality.