(2) The petition shall contain:
(a) A general description of the proposed improvement;
(b) A description of the tracts, or body of land, owned by the petitioners; and
(c) A description of the exterior boundaries of the land for which the proposed improvement is to be constructed and a description of any lands that are to be excepted from the benefit or use of the proposed improvement.
(3) The petition shall also contain an agreement on the part of the petitioners that the cost of construction of the improvement shall constitute a lien upon the lands within the exterior boundaries of the land described in the petition, except for the lands that are excepted from the benefit or use of the proposed improvement, and that the lands shall be assessed for and pay the cost of the improvement.
(4) The petition shall be deemed to give assent of the petitioners to construction of the improvement and shall authorize the assessment of the cost of such improvement upon and against the lands described in the petition and not specifically therein excepted. The petition shall be acknowledged in the same manner that conveyances of land are required to be acknowledged. [Formerly 545.402]