 and of the third class at the end of the twelfth year, so that one-third of the justices may be chosen every fourth year. Section 3. When a vacancy occurs in the Supreme Court, the President shall nominate a new justice who, with the approval of the majority of the Senate, shall serve the remainder of the unexpired term. Justices who fill a vacancy for longer than half of an unexpired term may not be renominated to a full term. Section 4.