Policy toward and support for Taiwan are a key element in U.S.- relations with the People's Republic of China (PRC) and an important component of U.S. policy in Asia. Official U.S. relations with the Republic of China (ROC) government on Taiwan became a casualty of the U.S. decision to recognize the PRC government as China's sole legitimate government. Since then, unofficial U.S. relations with Taiwan have been built on the framework of the 1979 Taiwan Relations Act (TRA – P.L. 96-8) and shaped by three U.S.-PRC communiques.