§ 99.46  DEFAULT.
   In default thereof, the city will enter into a contract for the furnishing of said material and the construction of the sidewalk as hereinafter provided.  The cost thereof shall be charged to and against the lots or parcels of land along the line of said street where the said sidewalk is to be built according to the frontage thereof and to be collected as hereinafter provided.
('68 Code, § 6.25)