2006 New York Code - Vacancies In Elective Offices.

 
    § 75. Vacancies in elective offices.  If a vacancy occur in the office
  of  the  president  of the Seneca nation, such office shall be filled by
  the council by a majority vote thereof, and a meeting of the council for
  that purpose shall be called by the clerk of the nation upon  a  written
  petition  presented  to  him,  signed  by  at least ten electors of such
  nation. If a vacancy occur in any other  office  of  such  nation,  such
  office  shall  be  filled by appointment by the president of the nation,
  under his hand and the seal of the nation.