10 ILCS 5/1A-6
One member of the State Board of Elections shall be elected by the members of the Board to be chair and shall serve as chair of the Board for a term ending June 30, 1979. On July 1 of 1979 and on July 1 of each odd-numbered year thereafter, a chair shall be elected by the members of the Board for a 2 year term ending June 30 of the next odd-numbered year. If July 1 of any odd-numbered year does not fall on a business day, said election shall be held on the first business day thereafter. The chair elected for each 2 year term shall not be of the same political party affiliation as the prior chair . Whenever a vacancy occurs in the office of chair , a new chair of the same political party affiliation shall be elected for the remainder of the vacating chair's term. Whenever a chair is elected, the Board shall elect from among its members, a vice chair who shall not be of the same political party affiliation as the chair .
Upon the confirmation of all of the members of the State Board of Elections initially appointed under the amendatory Act of 1978, the Governor shall designate one of the members as interim chair who shall preside over the Board until a chair is elected pursuant to this Section.
10 ILCS 5/1A-6