(a) In general.--The powers, duties and liabilities of a guardian not appointed by the court as to property of the minor to which his appointment lawfully extends shall be the same as the powers, duties and liabilities of a court appointed guardian, except as the instrument making the appointment shall provide otherwise.

(b) Substituted or succeeding guardian.--A substituted or succeeding guardian, except as otherwise provided by the instrument, if any, appointing the original guardian, in addition to the powers of a guardian appointed by the court, shall have all the powers, duties and liabilities of the original guardian. He shall have the power to recover the assets of the minor from his predecessor in administration or from the fiduciary of such predecessor and, except as otherwise provided in an applicable instrument, shall stand in the predecessor's stead for all purposes, except that he shall not be personally liable for the acts of his predecessor.

(c) Effect of removal, or of probate of later will or codicil.--No act of administration performed by a testamentary guardian in good faith shall be impeached by the subsequent revocation of the probate of the will from which he derives his authority, or by the subsequent probate of a later will or of a codicil, or by the subsequent dismissal of the guardian: Provided, That regardless of the good or bad faith of the testamentary guardian, no person who deals in good faith with a testamentary guardian shall be prejudiced by the subsequent occurrence of any of these contingencies.

Cross References. Section 5146 is referred to in section 5521 of this title.