Section 15-456 - Jurisdiction of county board of supervisors and county school superintendent over joint common school districtA. The county of jurisdiction of the proposed joint common school district is that county in which the greater portion of the qualified electors of the proposed joint common school district resides, unless all of the existing school buildings located on territory which will be within the proposed joint common school district are in one county, in which event that county shall be the county of jurisdiction.B. The jurisdictional county of the joint common school district shall exercise authority as provided for in this section and sections 15-429, 15-453 through 15-455, 15-457, 15-491, subsection B, 15-975 and 15-997. The county school superintendent of the jurisdictional county shall perform for and in respect to the joint common school district all duties required to be performed by county school superintendents. The board of supervisors of the same county shall have jurisdiction over and perform all duties for and with respect to the joint common school district as required to be performed by boards of supervisors, except that school district taxes to be levied on property in the portion of the joint common school district lying in another county shall be levied by the board of supervisors of such other county.