The Companies Act 2006 (c 46) is an Act of the Parliament of the United Kingdom which forms the primary source of UK company law. The Act was brought into force in stages, with the final provision being commenced on 1 October 2009. It largely superseded the Companies Act 1985. The Act provides a comprehensive code of company law for the United Kingdom, and made changes to almost every facet of the law in relation to companies. The key provisions are: