In the absence of an agreement between the suppliers affected and notwithstanding the provisions of subdivisions (1) to (5) of section 70-1007 :

(1) Existing service areas presently designated by agreements and exhibits filed with and approved by the board, or previously ordered by the board, shall remain and be established as certified service areas.

(2) A municipally owned electric system, serving such municipality at retail, shall have the right, upon application to and approval by the board, to serve newly annexed areas of such municipality. Electric distribution facilities and customers of another supplier in such newly acquired certified service area may be acquired, in accordance with the procedure and criteria set forth in section 70-1010, within a period of one year and payment shall be made in respect to the value of any such facilities’ customers or certified service area being transferred. The rights of a municipality to acquire such distribution facilities and customers within such newly annexed area shall be waived unless such acquisition and payment are made within one year of the date of annexation. If an application is made to the board within one year of the date of annexation for a determination of total economic impact as provided in section 70-1010, such right shall not be waived unless the municipality fails to make payment of the price determined by the board within one year of a final decision establishing such price. Notwithstanding other provisions of this section, the parties may extend the time for acquisition and payment by mutual written agreement.

(3) All retail power suppliers having adjoining certified service areas shall engage in joint planning with respect to customers, facilities, and services, taking into account the considerations specified in section 70-1007, including the possibility that an area may be annexed by a municipality within a reasonable period of time.