Section 1420-H. Construction contracts

The authority shall let contracts
  for construction in the same  manner,  so  far  as  practicable,  as  is
  provided  by  law  for  contracts  of  the  municipality  in  which such
  construction is to take place, except that where the  estimated  expense
  of a contract does not exceed twenty-five hundred dollars, such contract
  may  be  entered  into  without  public letting. Nothing in this section
  shall be construed to limit  the  power  of  the  authority  to  do  any
  construction  directly  by  the  officers,  agents  and employees of the
  authority.