Any functions delegated pursuant to the authority of § 18-3-3 shall be delegated by written power of attorney, signed before at least one witness, and the power of attorney may be acknowledged and recorded where the instrument or order under which the fiduciary was appointed is recorded, or, if the instrument or order has not been recorded in any town or city in this state, in the office of the recorder of deeds of the town or city in which any property included in the assets of the estate is situated.
R.I. Gen. Laws § 18-3-5