County referral. Should any amendment involve any change in the boundaries of any district, which change would occur within a distance of 500 feet of the boundary of any Village, town or city or change the regulations applying to any district so located or within 500 feet of any existing or proposed county or state park or other recreation area; right-of-way of any existing or proposed county or state parkway, thruway, expressway, road or highway; right-of-way of any stream or drainage channel owned by the state or county or for which the county has established channel lines; or boundary of any state- or county-owned land on which a public building or institution is situated, including public housing projects or lands of such authorities, such amendment, accompanied by notice of public hearing, shall be forwarded to the Westchester County Planning Department by the Village Clerk in accordance with the Westchester County Administrative Code, at least 10 days prior to the public hearing. The Village Clerk shall also cause notice to be sent to the Clerks of any effected municipalities. If the County Planning Department disapproves the proposed amendment or recommends modification thereof, the Board of Trustees shall not act contrary to such disapproval or recommendation except by affirmative vote of four members, setting forth in such resolution the reasons for such contrary action.