(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, a health care agent under an advance directive for health care, or a mental health care agent under a psychiatric advance directive.