A cross-party group of U.S. politicians have proposed a law to impose further restrictions on exports of computer chipmaking equipment to China, affecting companies such as ASML and China's top chipmakers. The draft MATCH Act announced late on Thursday is aimed at protecting the U.S. lead in artificial intelligence by preventing Chinese companies from obtaining chip manufacturing tools they cannot make themselves and ensuring that companies based in U.S.-allied nations face the same restrictions as their U.S. rivals.