(1)    In this section, “adverse party” means a person with a substantial beneficial interest in appointive property that would be affected adversely by a powerholder’s exercise or nonexercise of a power of appointment in favor of the powerholder, the powerholder’s estate, a creditor of the powerholder, or a creditor of the powerholder’s estate.

   (2)   If a powerholder may exercise a power of appointment only with the consent or joinder of an adverse party, the power is a nongeneral power of appointment.

   (3)   If the permissible appointees of a power of appointment are not defined and limited, the power is an exclusionary power of appointment.