Indiana Code Title 25. Professions and Occupations § 25-20.2-3-5

Sec. 5. (a) The chairperson shall preside at all meetings at which the chairperson is present.  The vice chairperson shall preside at meetings in the absence of the chairperson and shall perform other duties as the chairperson directs.

(b) If the chairperson and vice chairperson are absent from a meeting of the board when a quorum exists, the members who are present may elect a presiding officer who shall serve as acting chairperson until the conclusion of the meeting or until the arrival of the chairperson or vice chairperson.