South Korea plans to hold talks with the United States to rework the investor-state dispute (ISD) clause in their two-year-old free trade pact that has long been cited by critics as being unfair, a government source said Sunday. The insider, who did not wish to be identified, said Seoul will call for the service investment committee of the South Korea-U.S. free trade agreement (FTA) to touch on the ISD issue within the year.