(2) Notwithstanding subsection (1) of this section, a subdistrict created under provisions of this chapter can be formed in the formation proceedings if:
(a) The petition for formation states the purposes for which the petitioners request formation of both the district and subdistrict;
(b) The boundaries of both the district and subdistrict are coterminous;
(c) The description of the boundaries of the proposed subdistrict are certified as to complete and sufficient legal description by a qualified engineer or surveyor; and
(d) Owners of more than 50 percent of the acreage of the land in the proposed district and subdistrict sign the petition to form the water control district and subdistrict.
(3) After the creation of a subdistrict as provided by this chapter, the boundaries thereof may be changed by the inclusion of lands outside of the subdistrict upon the petition of the owners of 50 percent of the lands desiring to be included in the subdistrict. The lands to be added to the subdistrict must be within the boundaries of the district. The petition shall state the boundaries of the lands to be included in the subdistrict, the reason for adding the lands to the subdistrict, the names and addresses of each person signing the petition and a prayer asking that the lands described by the petition be annexed to the subdistrict. The petition shall be filed with the board of directors. A certificate containing a description of the boundaries of the subdistrict after the proposed addition, certified to as a complete and sufficient legal description of the subdistrict after the proposed annexation by a certified engineer or land surveyor, shall be filed with the board at the time the petition is filed. The board of directors shall enter an order fixing a time and place for a hearing on the petition and shall either give notice by publication of the hearing or a notice by mail to all landowners within the boundaries of the lands proposed for inclusion in the subdistrict. At the hearing or at any time and place to which the hearing may be adjourned, the board shall determine what lands proposed to be included within the subdistrict will be benefited by inclusion in the subdistrict, and the new boundaries of the subdistrict shall be described by the order. [Amended by 1961 c.186 §6; 1969 c.691 §5; 1971 c.727 §172; 2001 c.258 §1]