Execution of waivers or consents for wards

The duly appointed and acting guardian, limited guardian, conservator, attorney in fact, or any other person legally authorized to act on behalf of any minor or incapacitated or partially incapacitated heir, devisee or legatee may execute waivers or consents for his ward as authorized by the court. There shall be attached to each waiver or consent a certified copy of the instrument authorizing him to perform such act.