New York Public Service Law Section 3 - Department of public service.

 3. Department  of  public  service.  There  shall  be  in  the state
  government a department of public service. The chairman  of  the  public
  service   commission  shall  be  the  chief  executive  officer  of  the
  department. He or she shall appoint and shall have the power to  remove,
  subject  to  the  provisions  of  the  civil  service law, all officers,
  clerks, inspectors, experts and employees  of  the  department,  and  to
  approve  all contracts for special service. The chairman shall designate
  one of the  commissioners  in  the  department  or  an  officer  of  the
  department to act as deputy chairman during the absence or disability of
  the  chairman  and  during such times such deputy chairman shall possess
  all the powers of  the  chairman  as  chief  executive  officer  of  the
  department.

Last modified: February 3, 2019