The purpose of the PVP program is to provide specific product requirements for marketing U.S. pork and pork products to the Russian Federation under the USDA Export Verification Program. One of the product requirements is a 14-day withdrawal period for all soluble and feed-grade tetracycline products to satisfy Russia's tetracycline minimum residue level of MRL.
http://www.porkmag.com/news_editorial.asp?pgID=675&ed_id=9216