Indiana Code Title 3. Elections § 3-6-4.2-8

Sec. 8. (a) When a vacancy in a co-director position occurs, the secretary of state shall notify the governor and the state chairman of the political party of which the individual vacating the position is a member.

(b) The state chairman may submit to the governor in writing, within thirty (30) days after notice of the vacancy, the names of two (2) individuals to fill the vacancy.  If the state chairman submits the names of two (2) individuals within the thirty (30) day period, the governor shall appoint one (1) of the two (2) individuals to fill the vacancy.  If the state chairman fails to submit the names of two (2) individuals within the thirty (30) day period, the governor shall, within another ten (10) days, appoint an individual of the same political party as the state chairman to fill the vacancy.

(c) If a state chairman fails to submit in writing the name of a qualified successor within thirty (30) days after the state chairman is notified by the secretary of state of a vacancy, the governor shall:

(d) The state chairman may disapprove the selection by notifying the governor within seven (7) days after receiving notice of the governor's appointment.  If the state chairman disapproves the selection within the seven (7) day period, the governor shall make another appointment under subsection (b) which is subject to disapproval of the state chairman under this subsection.  If the state chairman does not disapprove the appointment within the seven (7) day period, the individual appointed by the governor shall be employed as the co-director.