Section 1256. Cooperation by localities

Every  city, county and school
  district shall cooperate with the state tax commission to enable  it  to
  carry out its duties under articles twenty-eight and twenty-nine of this
  chapter.  Every  such  locality  shall  furnish to such commission those
  returns, reports and other information which the  tax  commission  deems
  necessary  to  carry  out  such  duties,  except  that  cities  having a
  population of one million or more, may,  in  their  discretion,  furnish
  instead  copies  of  such  returns,  reports and other information. Such
  copies shall be furnished at the tax commission's expense, such expenses
  to be charged to the cost of administration.  Notwithstanding any  other
  law  to  the  contrary,  the  duty to furnish returns, reports and other
  information or copies thereof shall apply to those returns  and  reports
  filed  under  taxes authorized under chapter eight hundred seventy-three
  of the laws of nineteen hundred thirty-four, as amended,  chapter  three
  hundred forty-one of the laws of nineteen hundred forty-six, as amended,
  article   two-B  of  the  general  city  law  and  chapter  two  hundred
  seventy-eight of the laws of nineteen hundred forty-seven,  as  amended,
  and to such other information which is relevant to the duties of the tax
  commission under such articles twenty-eight and twenty-nine.