N.Y. PBH Law § 4120

§ 4120. Vital statistics; registration districts; establishment. 1.\nExcept as otherwise provided in this article, each city, incorporated\nvillage and town in the state shall constitute a separate primary\nregistration district, except that the commissioner may designate any\ncounty, except those comprising the city of New York, as a primary\nregistration district with the approval of the board of supervisors of\nsuch county.\n 2. To facilitate registration, the commissioner may:\n (a) with the approval of the legislative body of the county in which\neach affected district is located, combine two or more primary\nregistration districts into a single primary registration district; or,\n (b) divide one primary registration district into two or more primary\nregistration districts; or,\n (c) establish any state hospital, charitable or penal institution as a\nprimary registration district.\n 3. Whenever a county or part-county primary registration district has\nbeen established or two or more primary registration districts have been\ncombined, the records of birth and death and all papers pertaining to\nsuch records in the possession of the original primary registration\ndistrict or districts shall be transferred as directed by the\ncommissioner.\n