The U.S. Department of Agriculture has published an advance notice of proposed rulemaking concerning the scheduled expiration of 12 substances allowed or prohibited for use in organic agriculture. The regulatory allowance or prohibition in organic production and handling of 12 specific substances will expire on November 3, 2013. The National Organic Program (NOP) is initiating a review of the exemptions and prohibitions granted on the National List and is inviting comments from the public on these provisions. To read the full document and provide relevant comments, visit www.regulations.gov [identify docket number AMS-NOP-11-0003; NOP-10-13]. Comments must be submitted on or before August 1, 2011.