Utah Code Ann. § 16-6a-807 – Resignation of directors.

(1) A director may resign at any time by giving written notice of resignation to the nonprofit corporation.
(2) A resignation of a director is effective when the notice is received by the nonprofit corporation unless the notice specifies a later effective date.
(3) A director who resigns may deliver to the division for filing a statement that the director resigns pursuant to Section 16-6a-1608.
(4) The failure to attend or meet obligations shall be effective as a resignation at the time of the board of director's vote to confirm the failure if:
1. (a) at the beginning of a director's term on the board, the bylaws provide that a director may be considered to have resigned for failing to:
  1. (i) attend a specified number of board meetings; or
  2. (ii) meet other specified obligations of directors; and
2. (b) the failure to attend or meet obligations is confirmed by an affirmative vote of the board of directors.