and may order the Sergeant-at-Arms to enforce House rules. The speaker's powers and duties extend beyond presiding in the chamber. In particular, the speaker has great influence over the committee process. The speaker selects nine of the thirteen members of the powerful Committee on Rules, subject to the approval of the entire majority party. The leadership of the minority party chooses the remaining four members. Furthermore, the speaker appoints all members of select committees and conference committees. Moreover, when a bill is introduced, the speaker determines which committee will consider it. As a member of the House, the speaker is entitled to participate in debate and to vote. Ordinarily, the speaker votes only when the speaker's vote would be decisive or on matters of great importance, such as constitutional amendments or major legislation. Under the early rules of the House, the speaker was generally barred from voting, but today the speaker has the same right as other members to vote but only occasionally exercises it. The speaker may vote on any matter that comes before the House, and they are required to vote where their vote would be decisive or where the House is engaged in voting by ballot. Other functions In addition to being the political and parliamentary leader of the House of Representatives and representing their congressional district, the speaker also performs various other administrative and procedural functions, such as: Oversees the officers of the House: the clerk, the sergeant-at-arms, the chief administrative officer, and the chaplain; Serves as the chairperson of the House Office Building Commission; Appoints the House's parliamentarian, historian, general counsel, and inspector general; Administers the House audio and video broadcasting system; In consultation with the minority leader, can devise a system of drug testing in the House. This option has never been exercised; Receives reports or other communications from the president, government agencies, boards, and commissions; and Receives, along with the president pro tempore of the Senate, written declarations that a U.S. president is unable to discharge the powers and duties of his office, or is able to resume them, under Sections 3 and 4 of the Twenty-fifth Amendment. Additionally, the speaker is second in the presidential line of succession under the Presidential Succession Act of 1947, immediately after the vice president and before the president pro tempore of the Senate (who is followed by members of the president's Cabinet). Thus, if both the