Congress makes federal laws. A bill is a proposed law. Members of Congress can introduce bills. They debate the bill. They make changes. Congress must agree to send the bill to the president. When the president signs the bill, it becomes a federal law. One example of a federal law is the Americans with Disabilities Act. The act orders workplaces to treat people with mental disabilities and physical disabilities fairly. In 1989 and 1990, Congress debated and voted for the bill. Then, President George H.W. Bush signed the bill. It became a law. Congress makes federal laws.