(a) A power of appointment is irrevocable unless the donor reserves
the right to revoke it.
(b) An exercise of power of appointment is irrevocable whenever:
(1) The donor of a special power manifests his intention that its
exercise be irrevocable, or
(2) The donee does not manifest in the instrument exercising the power
his intention to reserve a power of revocation.
(c) If the donee in exercising a power reserves a power to revoke the
appointment, but does not expressly reserve a power to reappoint, upon
the exercise of the power of revocation, the donee can reappoint.
(d) An instrument exercising a power of appointment is affected by
fraud in the same manner as a deed or will, executed by an owner or by a
trustee of property.