Section 1058. Heads of departments to furnish copies of papers on demand

The heads of all administrations and departments, except the police  and
  law  departments,  and  the  chiefs of each and every division or bureau
  thereof, and all borough presidents shall, with  reasonable  promptness,
  furnish  to any taxpayer desiring the same, a true and certified copy of
  any book, account or paper  kept  by  such  administration,  department,
  bureau  or office, or such part thereof as may be demanded, upon payment
  in advance of ten cents for every hundred words thereof  by  the  person
  demanding  the  same.  The provisions of this section shall not apply to
  any papers prepared by or for the comptroller for use in any  proceeding
  to  adjust  or  pay a claim against the city or any agency, or by or for
  counsel for use in actions or proceedings  to  which  the  city  or  any
  agency  is  a  party, or for use in any investigation authorized by this
  charter.