Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. More International Cooperation Called Key to Curbing North Korea's Sanction Evasion Oh Taek-sung Christy Lee contributed to this report, which originated with VOA's Korean Service. WASHINGTON -- Increased international cooperation is essential for curtailing the ship-to-ship transfers that Pyongyang continues to use to evade sanctions, said a former United Nations panel expert on North Korean sanctions enforcement. "Every member state (of the United Nations) has one or two pieces of the puzzle," said Neil Watts, a maritime expert who served as a member of the United Nations panel that monitors North Korea sanctions compliance from 2013 to 2018. "And if they all cooperate, they can put together the full picture." North Korea seemingly is receiving a steady supply of oil through illegal transshipments, said Watts, as indicated by fuel prices that he said have been stable for the last 18 months in North Korea. Two essential tactics Watts told VOA's Korean Service Tuesday that two things are essential for going after Pyongyang's illicit ship-to-ship transfers at sea: Identify key North Koreans driving illicit transshipping networks, and follow the money trails. .