the members of a joint committee are drawn from
Joint Committee on Inaugural Ceremonies The members are sitting members of the United States Senate and House of Representatives. Typically, the House members include the Speaker of the House as well as the House majority and minority leaders. The Senate members are drawn from the leadership of the Senate Committee on Rules and Administration (previously known by other names). A senator acts as Chairman of the Joint Committee; the chairman is therefore drawn from the party in control of the Senate, which may or may not be the same party as the president-elect's. Membership in the committee gives its members the opportunity to control tickets to the inauguration ceremonies.
United States congressional conference committee The authority to appoint conferees lies in the entire House, and the entire Senate can appoint conferees by adopting a debatable motion to do so.[3] But leadership have increasingly exercised authority in the appointment of conferees.