The Senate is led by a President and the House by a Speaker whose respective duties and prerogatives enable them to influence the legislative process significantly. The President and the Speaker appoint the members of most committees and name their chairs and vice-chairs, except in the case of the Joint Committee on Investigation whose members elect their own officers. The President and Speaker preside over the daily sessions of their respective chambers, maintaining decorum and deciding points of order. As legislation is introduced, they assign it to a standing committee for consideration and a public hearing.