No office, position or employment, created and existing at the time when the Revised Statutes shall become effective, under or by virtue of any statute then in force, shall be abolished nor shall the tenure, term or salary of any incumbent thereof be in any manner affected by the enactment of the Revised Statutes; but such office, position or employment shall continue and be held in all other respects subject to the provisions relating thereto contained in the Revised Statutes.