www.supplychainbrain.com/articles/21188-us-sued-over-change-to-rules-governing-substances-in-organic-foods

U.S. Sued Over Change to Rules Governing Substances in Organic Foods
April 10, 2015
In the suit, filed in Federal District Court for the Northern District of California, the group contends that the department violated procedures for federal rule-making when it changed the way non-organic substances are approved for use in organic farming without holding a public hearing or seeking public comment.
Under the Organic Foods Production Act of 1990, organic producers may use only approved substances in farming and animal husbandry. The law created a list of exceptions, known as the National List, because organic versions of substances like copper sulfate and hydrogen peroxide were not available.