There are two types of powers of appointment: a general power of appointment and a limited (special) power of appointment. Each of these types of powers carries different and significant tax implications.
General Power of Appointment:
In a general power of appointment the donor gives the donee authority to appoint (transfer) the donor's rights, assets, or items to anyone the donee wishes, including the donee himself. Potential adverse tax consequences accrue to a donee who possesses a general power of appointment: the rights, assets, or items which the donee has power to appoint are considered the donee's property for gift and estate tax purposes.
Limited (Special) Power of Appointment:
In a limited (special) power of appointment the donor limits the donee's authority to appoint (transfer) the donor's rights, assets, or items. The authority may be limited in various ways. For example, the donee may be limited in regard the the persons to whom he or she can appoint assets; or the donee may be limited in regard to the times at which he or she can appoint assets; or the donee may be limited in regard to the purposes for which he or she can appoint assets (for instance, the health, education, maintenance, or support of the appointee). In certain circumstances the donee possessing a limited power of appointment and the appointee may be the same person. With a limited (special) power of appointment, the Internal Revenue Service usually does not consider the rights, assets, or items subject to appointment to be owned by the donee in determining the donee's own gift and estate taxes. In estate planning, generally a limited (special) power of appointment is preferred over a general power of appointment.