(a) Unless provided otherwise by the governing instrument, any power vested in 3 or more fiduciaries or nonfiduciaries by the governing instrument or by law may be exercised by a majority of such fiduciaries or nonfiduciaries and a majority of fiduciaries or nonfiduciaries named in a governing instrument may designate 1 of such fiduciaries or nonfiduciaries to perform ministerial functions on behalf of all such fiduciaries or nonfiduciaries. A fiduciary or nonfiduciary who dissents from the action of the majority is not liable to anyone having an interest in the fiduciary fund, or to the other fiduciaries or nonfiduciaries, if such dissent is evidenced by a writing delivered to the majority of the fiduciaries or nonfiduciaries.
(b) This section does not excuse a cofiduciary or co-nonfiduciary from liability for failure to participate in the administration of the fiduciary fund or for failure to attempt to prevent a breach of trust, or for failure to seek advice and guidance from the court in a recurring situation, unless otherwise expressly provided by the governing instrument.