That the petition of the voters of each of the counties interested in such change shall be presented to their respective boards of county commissioners at the same regular session; and it shall be the duty of said board of county commissioners, upon being so petitioned, to order that at the next general election holden thereafter, a vote shall be taken by the several counties interested upon the proposed change: Provided, however, That no order shall be made conflicting with the provisions of section 1 of article 9 of the constitution.
K.S.A. 18-203