Indiana Code Title 23. Business and Other Associations § 23-17-10-4

Sec. 4. (a) Unless limited or prohibited by the articles of incorporation or bylaws, action required or permitted by this article to be approved by the members may be taken without a meeting of members if the action is approved by members holding at least eighty percent (80%) of the votes entitled to be cast on the action.  The action must be evidenced by at least one (1) written consent describing the action taken that meets the following conditions:

Requests for written consents must be delivered to all members.

(b) If not otherwise determined under section 3 or 7 of this chapter, the record date for determining members entitled to take action without a meeting is the date the first member signs the consent under subsection (a).

(c) A consent signed under this section:

(d) Action taken under this section is effective when the last member necessary to meet the eighty percent (80%) requirement signs the consent unless a prior or subsequent effective date is specified in the consent.