(1)When any street works to be executed under the private street works code have been completed, and the expenses of them ascertained, the proper officer of the council shall make a final apportionment by dividing the expenses in the same proportions as those in which the estimated expenses were divided in the original or amended provisional apportionment, as the case may be, and notice of the final apportionment shall be served on the owners of the premises affected by it.
(2)Within one month from the date on which notice of the final apportionment is served on him, the owner of any premises shown in the apportionment as liable to be charged may, by notice to the authority, object to the apportionment on the following grounds, or any of them:—
(a)that there has been an unreasonable departure from the specification, plans and sections;
(b)that the actual expenses have without sufficient reason exceeded the estimated expenses by more than 15 per cent;
(c)that the apportionment has not been made in accordance with this section
Objections under this section shall be determined in the like manner, and subject to the like provisions with respect to the persons entitled to be heard and otherwise, as objections to the provisional apportionment.
(3)The final apportionment, subject to any amendment made to it by a court on the hearing of objections to it under this section, is conclusive for all purposes.