Idaho Code § 33-3103
The said board of trustees may conduct its proceeding in such manner as will best conduce to the proper dispatch of business. A majority of the board of trustees shall constitute a quorum for the transaction of business, but a less number may adjourn from time to time[.] No member of said board of trustees shall participate in any proceeding in which he has any pecuniary interest. Every vote and official act of the said board of trustees shall be entered of record. No vacancy in the board of trustees shall impair the right of the remaining trustees to exercise all the powers of the said board of trustees. At their first meeting, and annually thereafter, the said board of trustees shall elect from their number a chairman, a vice-chairman and a secretary. The state treasurer shall be treasurer of said board of trustees. It shall be the duty of the secretary to keep an accurate and detailed account of the doings of the board.
Idaho Code § 33-3103