§ 931. Employees of the district attorneys in counties contained
within the city of New York. The district attorney of each county
contained within the city of New York is vested with the power to
appoint any person to any position for which there is now provision by
appropriation or which shall hereafter be established. All positions in
the several district attorneys' offices within the city of New York for
which there is now provision by appropriation shall be continued, except
that the mayor of the city of New York may with the consent of the
district attorney increase or decrease the number of positions and the
term, grade, salary and compensation of any position.