Section 811. Powers and duties of the commissioner; general

The
  commissioner shall be responsible for citywide personnel matters, as set
  forth in this chapter, and shall have all the powers  and  duties  of  a
  municipal  civil service commission provided in the civil service law or
  in any other statute or local law other than such powers and  duties  as
  are  by  this  chapter  assigned  to  the  mayor, the city civil service
  commission or the heads of city  agencies;  the  commissioner  shall  in
  addition  have  the power to perform all the functions and operations of
  the city of New York relating to the  maintenance  and  care  of  public
  buildings  and  facilities;  the procurement of goods and other personal
  property; the disposition of surplus property;  the  provision  to  city
  agencies  of  services  other  than  personal services; the acquisition,
  disposition and management by the  city  of  real  property  other  than
  housing;  and  the  provision  of automotive, communication, energy, and
  data processing services.