(5)Where any person subject to this Act is being tried on a charge of desertion or of absence without leave, and such person has surrendered himself into the custody of any officer or other person subject to this Act, or any portion of the Air Force, or has been apprehended by such officer or person, a certificate purporting to be signed by such officer, or by the commanding officer of that portion of the Air Force, or by the commanding officer of the unit, or detachment to which such person belongs, as the case may be, and stating the fact, date and place of such surrender or apprehension, and the manner in which he was dressed, shall be evidence of the matters so stated.
