China's Import Inspection Authority, AQSIQ, is now requiring U.S. distiller's dried grains imports to be officially certified free of the MIR 162 GMO trait, the U.S. Grains Council, an export trade group, said in a letter emailed to Reuters by a trade source. The new requirement is effective immediately, the letter said. All DDGs shipments departing from July 24 that do not meet the certification requirement will be rejected, the North American Export Grain Association (NAEGA) said in a note to members, emailed to Reuters by another trade source. The U.S. Grains Council (USGC) added it would have to "discontinue its role as the agent for U.S.