Section 408-A. Advertising for bids; letting of contracts

1.   Every
  officer, board or agency of the  county  shall  let  all  contracts  for
  public  work and all purchase contracts to the lowest responsible bidder
  after advertisement for bids where so required by  section  one  hundred
  three  of  the  general  municipal  law.    The board of supervisors may
  require contracts involving an  expenditure  of  less  than  the  amount
  specified in such section to be let in the manner provided therein.  The
  term  "officer"  as  used  in  this  section  shall mean and include any
  officer paid compensation from county funds.
    2. The board of supervisors may, in the case of any purchase  contract
  or  any  contract  for  services, other than services subject to article
  eight or nine of the labor law, of the  county  to  be  awarded  to  the
  lowest  responsible  bidder  after advertisement for bids, authorize the
  inclusion of a provision whereby purchases may be made or such  services
  may be obtained under such contract by any political subdivision or fire
  company  (as  both  are  defined  in  section one hundred of the general
  municipal law) or district. In such event, the board shall  adopt  rules
  prescribing  the  conditions  under  which,  and  the  manner  in which,
  purchases may be made or services may  be  obtained  by  such  political
  subdivision, fire company or district.