Section 930. Assistant district attorneys; salaries

The district attorney
  of each county contained within the city of New York  is  hereby  vested
  with  the  power  to  appoint  and  at  pleasure to remove any assistant
  district attorney attached to his office. The number of  such  assistant
  district  attorneys  and  deputy  assistant district attorneys for which
  there is now provision by appropriation and the salary paid to  each  of
  them  shall  be  continued  except  as  hereinafter provided. All deputy
  assistant district attorneys shall become  and  hereafter  be  known  as
  assistant district attorneys. The number of assistant district attorneys
  and  the salary paid to any assistant district attorney may be increased
  or decreased by the mayor of the city of New York with  the  consent  of
  the district attorney.