An Act of Parliament is a form of legislation that is passed by the parliament intended to create a new law or change an existing law. A bill must pass and win royal assent in order to become law.
After implementation, an Act of Parliament applies to the whole country or specific areas of the country. Once the act is in place, it can only be changed or ceased by passing of another act. An act can be annulled so that its provisions may no longer apply. The parliament has the responsibility of making new laws and investigates how the government implements an act.