Section 20. The court constituted

The criminal court of the city of New
  York is hereby established as a single, city-wide court, as provided  by
  sections one and fifteen of article six of the constitution; it shall be
  a  part of the unified court system for the state, and a court of record
  with such power and jurisdiction as are herein or elsewhere provided  by
  law.  It shall consist of the number of justices of the court of special
  sessions  of  the  city  of  New  York  and  magistrates  of  the   city
  magistrates'  courts  of  the  city of New York authorized by law on the
  first day of March, nineteen hundred sixty-two. Each of the justices  of
  the  court  of  special sessions of the city of New York and each of the
  magistrates of the magistrates' courts of the city of New York in office
  on the first day of September, nineteen hundred sixty-two  shall,  until
  the  last  day  of the year in which the term for which he was appointed
  would otherwise have expired, be a judge of the criminal  court  of  the
  city  of  New York. In addition to the judges provided for herein, there
  shall be twenty-nine additional  judges  of  the  criminal  court.  Such
  additional  judges  shall  receive the same compensation as the existing
  judges of the criminal court of the city of New York.