(a) Unless the court's order specifies that one or more of the following powers are to be retained by the ward, the appointment of a guardian shall remove from the ward the power to:
(1) Contract marriage;
(2) Make, modify, or terminate other contracts;
(3) Consent to medical treatment;
(4) Establish a residence or dwelling place;
(5) Change domicile;
(6) Revoke a revocable trust established by the ward; and
(7) Bring or defend any action at law or equity, except an action relating to the guardianship.
(b) The mere appointment of a guardian does not revoke the powers of an agent who was previously appointed by the ward to act as an agent under a durable power of attorney for health care or health care agent under an advance directive for health care.