Section 24-348. Advertisement for sealed bids or proposals for work or materials; publication

When  the  form  of  any  contract  with   its  specifications  and  the  form of bond for the performance thereof shall
  have been approved as provided for in section 24-347,  the  commissioner
  shall  advertise  for  sealed bids or for proposals for the doing of the
  work or the furnishing of the materials called for in such approved form
  of contract. Such advertisment shall be published in the City Record and
  in two daily newspapers published in the city, to be designated  by  the
  commissioner,  for  at  least fifteen days consecutively before the time
  fixed for the closing of the bid box.