The city council may, by an order entered upon its minutes, at any regular or special meeting called for that purpose, order the repair, construction or grading of sidewalks within the corporate limits of the city, and direct the city clerk-treasurer to notify the owner, agent, or attorney of all lots or parts of lots affected by such improvements, to the extent that their respective pieces of property are assessed with the costs of such improvements. Such notice shall be given in writing, and if the repairing, construction or grading, as the case may be, of such sidewalks is not begun within twenty (20) days from the date of such notice and completed within such time as the city council shall fix, or if not begun at the time fixed, then it shall be the duty of the city council to let the improvements, grading, or construction, as the case may be, to the lowest responsible bidder, who shall give a bond, to be approved by the city council, in the amount of twenty five percent (25%) of the bid, to run in the name of the city, for the completion of the work within the time and manner provided for the contract for such work or improvements. (Ord. 36, 8-7-1962)