*132. Officers.*--The officers of the House of Lords are largely appointive, though in part elective. Except during the trial of a peer,[181] the presiding official is the Lord Chancellor, appointed by the crown on the advice of the premier. The duty of presiding in the Lords, as has been explained, is but one of many that fall to this remarkable dignitary.[182] If at the time of his appointment an (p. 126) incumbent is not a peer he is reasonably certain to be created one, although there is no legal requirement to this effect. The theory is that the woolsack which comprises the presiding official's seat is not within the chamber proper[183] and that the official himself, as such, is not a member of the body. The powers allowed him are not even those commonly possessed by a moderator. In the event that two or more peers request the privilege of addressing the chamber, the peers themselves decide which shall have the floor. Order in debate is enforced, not by the Chancellor, but by the members, and when they speak they address, not the chair, but "My Lords." Although, if a peer, the Chancellor may speak and vote as any other member, he possesses as presiding officer no power of the casting vote. In short, the position which the Chancellor occupies in the chamber is all but purely formal. In addition to "deputy speakers," designated to preside in the Chancellor's absence, the remaining officials of the Lords who owe their positions to governmental appointment are the Clerk of Parliament, who keeps the records; the Sergeant-at-Arms, who attends personally the presiding officer and acts as custodian of the mace; and the Gentleman Usher of the Black Rod, a pompous dignitary whose function it is to summon the Commons when their attendance is required and to play a more or less useful part upon other ceremonial occasions. The one important official whom the House itself elects is the Lord Chairman of Committees, whose duty it is to preside in Committee of the Whole. [Footnote 181: See p. 127.] [Footnote 182: See p. 63.] [Footnote 183: In the days of Elizabeth the presiding official sat upon a sack actually filled with wool. He sits now, as a matter of fact, upon an ottoman, upholstered in red. But the ancient designation of the seat survives.] IV. PRIVILEGES OF THE HOUSES AND OF MEMBERS