The cost of constructing, reconstructing, and repairing all sidewalks abutting on lots or pieces of land belonging to the city or to the state or to the United States, and that portion of the sidewalk extending from the projected property line to the curb and which does not abut on and which is not in front of or along-side of any lot or piece of land, shall be paid for by the city unless the state or the United States shall pay the cost of the sidewalk abutting on property owned by the state or the United States, and may be paid for out of the fund provided for the maintenance of streets or general improvement fund or by the issuance of scrip or bonds and the levying of taxes to pay such scrip or bonds.