A parent or a guardian of a minor or incapacitated person, by a properly executed power of attorney, may delegate to another person, for a period not exceeding six months, any of his or her powers regarding care, custody, or property of the minor child or ward, except his or her power to consent to marriage or adoption of a minor ward. A parent or guardian of a minor who is at least eighteen years of age and who is not a ward of the state, by a properly executed power of attorney, may delegate to such minor, for a period not exceeding one year, the parent's or guardian's power to consent to such minor's own health care and medical treatment.
Neb. Rev. Stat. §§ 30-2604