By convention the casting vote is issued in accordance with the constitutional convention known as Speaker Denison's rule, rather than in line with the speaker's personal opinion in the matter. The principle is always to vote in favour of further debate, or, where it has been previously decided to have no further debate or in some specific instances, to vote in favour of the status quo. For example, the speaker would vote against a closure motion, or the final passage of a bill, or an amendment. Since the House of Commons has over 600 members, tied votes are very uncommon and speakers are rarely called upon to use the casting vote. Since 1801, there have been only 50 instances of tied divisions. A casting vote by a Speaker was cast on 3 April 2019, the first since 1993, against an amendment to the Business of the House Motion. Speaker Bercow affirmed the precedent that it was not the role of the chair to create a majority that did not otherwise exist for action. Other functions In addition to the role of presiding officer, the speaker performs several other functions on behalf of the House of Commons. The speaker represents the body in relations with the Sovereign, the House of Lords, and non-parliamentary bodies. On important occasions of state (such as Queen Elizabeth II's Golden Jubilee in 2002), the speaker presents Addresses to the Crown on behalf of the House. The speaker performs various procedural functions such as deciding whether to recall the House from recess during a national emergency, when requested by the Government. When vacancies arise, the speaker authorises the issuance of writs of election. Furthermore, the speaker is responsible for certifying bills that relate solely to national taxation as "money bills" under the Parliament Acts 1911 and 1949. The House of Lords has no power to block or substantially delay a money bill; even if the Lords fail to pass the bill, it becomes law within a month of passage by the Commons. The speaker's decision on the matter is final, and cannot be challenged by the Upper House. Under the English votes for English laws procedures, the speaker certifies which bills or parts of bills relate to England or England & Wales only. The speaker is also responsible for overseeing the administration of the House. The speaker chairs the House of Commons Commission, a body that appoints