Act of Congress refers to statutes or legislation that are formally enacted by Congress through the legislative powers granted to Congress by the U.S. Constitution.
To become an Act of Congress, first a bill or a resolution has to be passed by a majority of members of both the House of Representatives and the Senate. The bill or resolution is sent to the chamber through a committee. The bill is sent back to the same committee after the bill is passed by both the chambers. The committee then sent the bill or resolution to get the president's assent. The bill or resolution becomes an Act of Congress:
1. if the President signs the bills; or
2. if the President fails to return the bill or resolution with in ten days.