Contracts for the construction, reconstruction or repair of sidewalks as provided in this Article, when the expense thereof exceeds one thousand five hundred dollars ($1,500.00) shall be let to the lowest responsible bidder in the following manner: Notice shall be given by the officer or board designated in the ordinance to take charge of the construction, reconstruction or repair and supervision of a sidewalk by advertisement at least twice, not more than thirty (30) nor less than fifteen (15) days in advance of the day of opening the bids, that bids will be received for the construction, reconstruction or repair of that sidewalk in accordance with the ordinance therefor, in one or more newspapers published within the village. The notice shall state the time of opening the bids. All bids offered shall be accompanied by cash or a check payable to the order of the officer or board having charge of the improvement, and certified by a responsible bank, for an amount which shall not be less than ten percent (10%) of the aggregate of the bid. All contracts shall be approved by the officer of the board, having the supervision of the construction, reconstruction or repair of that sidewalk. (Ord. 0-76-47, 8-16-1976)