The Lords Commissioners are privy counsellors appointed by the monarch of the United Kingdom to exercise, on his or her behalf, certain functions relating to Parliament which would otherwise require the monarch's attendance at the Palace of Westminster. These include the opening and prorogation of Parliament, the confirmation of a newly elected Speaker of the House of Commons and the granting of royal assent. The Lords Commissioners are collectively known as the Royal Commission. The Royal Commission includes at least three—and usually five—Lords Commissioners. In current practice, the Lords Commissioners usually include the Lord Chancellor, the Archbishop of Canterbury, the leaders of the three major parties in the House of Lords, the convenor of the House of Lords Crossbenchers and the Lord Speaker. Occasionally there are substitutions if the normal commissioners are unavailable.