Nothing contained in the Seventy-second Section of the recited Act shall require the putting back into the River of any foul, unclean, or unseasonable Sea Trout, Bull Trout, or Whitling taken or captured by means of the Rod and Line, or render liable to any Penalty any Person who shall not put back into the River any such Sea Trout, Bull Trout, or Whitling so taken or captured; provided that the Proof that any such Sea Trout, Bull Trout, or Whitling was taken or captured by means of the Rod and Line shall lie upon the Person in whose Possession the same shall be found.