Section 364. Provisions of public service law applicable

1. Except as
  provided in subdivision two of this section, all of  the  provisions  of
  article  four  of  the  public  service  law,  so  far  as  the same are
  applicable, shall apply to a municipal corporation furnishing  a  public
  utility service under this article.
    2.  (a)  A  municipal corporation need not apply to or obtain from the
  public service commission  a  certificate  of  authority  for  a  public
  utility service under this article.
    (b)  A  municipal  corporation  furnishing a public utility service or
  services need not decrease its rates and charges  for  such  service  or
  services  on order of the public service commission unless such order is
  issued upon notice  and  after  hearing  instituted  upon  the  verified
  complaint  in  writing  of  not  less  than  twenty-five  of  the active
  consumers as shown by the  records  of  the  utility,  residing  in  the
  territory  in  which  the  utility  rate  or  rates  referred to in said
  complaint is or are applicable.