(1) No rule adopted under this part shall cause undue interference with normal agricultural and forestry practices.
(2) Nothing in this part shall be construed to permit a person to violate any provision of federal law concerning federally protected endangered or threatened species.
(3) Ginseng, Panax quinquefolius, is regulated under title 62, chapter 28 and is exempt from this part.
(4) This part shall not affect rights and duties that matured, penalties that were incurred or proceedings that were begun before July 1, 1985.