South Korea and the United States have agreed on final changes to their free trade agreement, paving the way for its signing on June 30, the prime minister's office said Friday. Prime Minister Han Duck-soo told managing editors of major newspapers and broadcast outlets that Seoul and Washington had agreed to change parts of the agreement to include new U.S. labor and environmental standards for free trade agreements, his office said. Han said the agreement was reached, and "trade ministers of both sides plan to sign at 10 a.m. June 30 (1400 GMT) in Washington," an official in Han's office who was present at the meeting quoted him as saying.