Ceremonial maces in the United Kingdom carried by the Yeoman Usher of the Black Rod and placed behind the Lord Speaker on the Woolsack before the House sits. All members are required to bow their heads to the mace upon entering the chamber. It is absent when the monarch delivers his or her speech from the throne at State Openings of Parliament. The other mace accompanies the Lord Chancellor on official duties outside the House of Lords. Mace A was made in the reign of Charles II , is long and weighs . Mace B was made in the reign of William III and Mary II
Lords Commissioners of the Treasury the powers of the Houses of Parliament in favour of the lower house. From the Glorious Revolution and onwards it had become increasingly constitutionally untenable for the person setting fiscal policy (i.e. the Chancellor) to reside in the House of Lords, a principle which was embedded permanently in the constitution from 1718 with the resignation of Lord Stanhope (note this excepts the brief tenures of certain Lord Chief Justices, who historically assumed the office of Chancellor of the Exchequer "pro tempore" during vacancies, and who were often peers). That notwithstanding, the constitutional convention mandating that the Prime Minister reside in