§ 570. Advisory valuations of utility real property. Upon the written request of the assessors of any city, town or village having a population of less than ten thousand according to the latest federal census and an assessed valuation of less than ten million dollars, the commissioner shall furnish the full value of the real property therein of a public utility subject to the jurisdiction of the state department of public service. The valuations so furnished shall be for the advice of the assessors and shall not be binding upon them.