If an irrevocable trust has two grantors and the power of appointment reserves two the grantors, jointly, a power of appointment to change the remainderpersons, then after the death of the grantors, the surviving grantor cannot unilaterally exercise the power of appointment.1

  1. Whitehouse v. Gahn, 922 N.Y.S.2d 546 (App. Div. 2d 2011).