The Constitution of the United Kingdom is the uncodified body of law which constitutes the rules for how the country functions. It consists mostly of written sources, including charters, statutes, judge-made case law, EU law and international treaties. Because of the lack of a single codified constitutional document, the United Kingdom constitution is commonly mislabelled as an "unwritten constitution". For the most part it is written, but is not redacted or reduced into a single document. However, the constitution does have some unwritten sources, including conventions, the royal prerogatives and works of authority.