If the signature, rank, and branch of service or subdivision thereof, of any such commissioned officer appear upon such instrument or document or certificate, no further proof of authority of the officer so to act shall be required and the action by the commissioned officer shall be prima facie evidence that the person making the oath or acknowledgment is within the purview of §§ 34-12-5 - 34-12-7.
R.I. Gen. Laws § 34-12-8