Unless it is otherwise provided by the trust instrument, or an amendment thereof, or by court order:

1. A. Any power vested in three or more trustees may be exercised by a majority of such trustees; but no trustee who has not joined in exercising a power shall be liable to the beneficiaries or to others for the consequences of such exercise, nor shall a dissenting trustee be liable for the consequences of an act in which he joins at the direction of the majority trustees, if he expressed his dissent in writing to any of his cotrustees at or before the time of such joinder.
2. B. Where two or more trustees are appointed by will or a voluntary trust to execute a trust and one or more of them die, the survivor may execute the trust and may exercise the discretionary powers given to the trustees jointly, unless the terms of the will or agreement express a contrary opinion.
3. C. Any cotrustee may give a power of attorney to another trustee or authorize a cotrustee to perform any act in the administration of the trust, but such trustee giving a power of attorney or authorizing an act to be performed by his cotrustee shall have the same liability and responsibility as if he, himself, had performed the act done pursuant to such authorization.
4. D. Nothing in this section shall excuse a cotrustee from liability for inactivity in the administration of the trust, nor for failure to attempt to prevent a breach of trust.

Laws 1941, p. 253, § 17.