(a) The terms of the governing instrument of an express total return unitrust may provide the method similar to the method provided under G.S. 37A-1-104.2(a) for changing the unitrust percentage or for converting from a unitrust to an income trust or for a reconversion of an income trust to a unitrust, or for all of these actions.
(b) If the terms of the governing instrument of an express total return unitrust do not specifically or by reference to G.S. 37A-1-104.2 grant a power to the trustee to change the unitrust percentage or change to an income trust, the trustee shall not have that power.