Last week the UN Security Council agreed to partially waive the sanctions on North Korea for a project to reconnect its railways with those of the South and to modernize them.<br />Now the U.S. has granted an exemption to its sanctions for the project.<br /> Sources in the South Korean government tell Yonhap News on the condition of anonymity that the sanctions waiver from Washington has been finalized in talks with Seoul.<br />The U.S. has been imposing unilateral sanctions on North Korea in addition to the international ones, and those sanctions ban the transfer of refined petroleum products to the North -- something that would be needed for the project.<br />The two Koreas are expected to start work on it next week. <br />