(a) The governing body of any city proposing to annex land under the provisions of Kan. Stat. Ann. § 12-520, and amendments thereto, shall make plans for the extension of services to the area proposed to be annexed and shall, prior to the adoption of the resolution provided for in Kan. Stat. Ann. § 12-520a, and amendments thereto, prepare a report setting forth such plans. The report shall include:

(1) A sketch clearly delineating the land proposed to be annexed and the area of the city adjacent thereto to show the following information:

(A) The present and proposed boundaries of the city affected by such proposed annexation;

(B) the present streets, water mains, sewers and other city utility lines, and the proposed extension thereof; and

(C) the general land use pattern in the areas to be annexed.

(2) A statement setting forth a plan of sufficient detail to provide a reasonable person with a full and complete understanding of the intentions of the city for extending to the area to be annexed each major municipal service provided to persons and property located within the city and the area proposed to be annexed at the time of annexation and the estimated cost of providing such services. The plan shall state the estimated cost impact of providing such services to the residents of the city and the residents of the area proposed to be annexed. The plan shall state the method by which the city plans to finance the extension of such services to such area. Such plan shall include a timetable of the plans for extending each major municipal service to the area annexed. The plan shall state the means by which the services currently provided by a township or special district in the area to be annexed shall be maintained by the city at a level which is equal to or better than the level of services provided prior to annexation. The plan shall state those services which shall be provided immediately upon annexation and those services which may be provided upon petition of the landowners to create a benefit district.

(b) A copy of the plan for extension of services shall be sent by certified mail not less than 10 days prior to the public hearing as provided in Kan. Stat. Ann. § 12-520a, and amendments thereto, to the board of county commissioners.

(c) The preparation of a plan for the extension of services required by subsection (a) shall not be required for or as a prerequisite to the annexation of land of which all of the owners petition for or consent to such annexation in writing.