Home/American Shipper/U.S., Peru urge end to yarn forward rule American Shipper U.S., Peru urge end to yarn forward rule FreightWaves Staff · Monday, February 13, 2012 U.S. import and Peruvian export advocates last week sent a letter to the chief Peruvian and U.S. trade negotiators urging elimination of a “yarn forward” rule of origin on apparel.