All plans and specifications adopted for the permanent improvement of streets or public ways shall, in addition to the necessary provisions regarding grading and the construction of the improvement proper, provide for all connections mentioned in § 50.055. All connections not made by owners of abutting lots and lands within the 30-day period shall be and are required to be included in the general contract for the improvement and constructed at the cost of the respective defaulting owners. The cost of the connections so included in the general contract shall be assessed against the abutting property and shall be a lien thereon and collected in the same manner as expenses of other street improvements.
(Prior Code, § 50.056) Penalty, see § 50.999