The presiding officer of the Senate is the Lieutenant Governor of Oklahoma, who is the President of the Senate. Since the 1960s, the President Pro Tempore of the Senate has presided over daily work. Prior to that time, the President of the Senate took a leading role in the Senate, including appointing committees and members to those committees. The President of the Senate may cast a vote only in the instance of a tie vote and may not vote to create a tie.