Art. 2 Section 15 VACANCIES IN LEGISLATURE AND IN PARTISAN COUNTY ELECTIVE OFFICE. Such vacancies as may occur in either house of the legislature or in any partisan county elective office shall be filled by appointment by the board of county commissioners of the county in which the vacancy occurs: Provided, That the person appointed to fill the vacancy must be from the same legislative district and the same political party as the legislator whose office has been vacated, and shall be one of three persons who shall be nominated by the county central committee of that party, and the person so appointed shall hold office until his successor is elected at the next general election, and shall have qualified: Provided, That in case of a vacancy occurring in the office of joint senator, or joint representative, the vacancy shall be filled from a list of three nominees selected by the state central committee, by appointment by the joint action of the boards of county commissioners of the counties composing the joint senatorial or joint representative district, the person appointed to fill the vacancy must be from the same legislative district and of the same political party as the legislator whose office has been vacated, and in case a majority of said county commissioners do not agree upon the appointment within sixty days after the vacancy occurs, the governor shall within thirty days thereafter, and from the list of nominees provided for herein, appoint a person who shall be from the same legislative district and of the same political party as the legislator whose office has been vacated.