(1) IN GENERAL- Notwithstanding any provision of a commodity promotion law, a person that produces and markets solely 100 percent organic products, and that does not produce any conventional or nonorganic products, shall be exempt from the payment of an assessment under a commodity promotion law with respect to any agricultural commodity that is produced on a certified organic farm (as defined in section 2103 of the Organic Foods Production Act of 1990 (7 U.S.C. 6502)).