Section 625. County purchasing agent; terms; duties

The  board  of
  supervisors shall have power to create the office of  county  purchasing
  agent,  who  shall be appointed for the term for which the membership of
  such board appointing him was elected. Except as otherwise  provided  by
  law,  he  shall  make  all  purchases and contracts for supplies for the
  various county offices,  buildings,  institutions  and  grounds  of  the
  county, and shall let to public advertisement and bid all purchases when
  so  required  by section one hundred three of the general municipal law.
  He shall prescribe  the  form  of  requisitions,  and  of  receipts  for
  supplies  delivered  without  requisition. No claim shall be audited and
  paid without the requisition or delivery receipt being attached thereto.
  He shall be the custodian of all vouchers,  requisitions,  receipts  and
  other   papers   pertaining  thereto  which  shall  be  open  to  public
  inspection. He shall upon dates to be fixed by the  board  and  covering
  periods to be specified by it furnish to the county treasurer and to the
  clerk  of  the board of supervisors verified statements of all purchases
  together with the quantity and price and shall furnish to the  board  of
  supervisors such additional statements as the board may direct. He shall
  perform  such  additional and related duties as may be prescribed by law
  and directed by the board of supervisors.