sentences:  There are two levels, matching those of the teaching-research staff
  
  
  The main differences between these research positions and the faculty positions are, of course, the absence of teaching duties, and the ability to move between different labs (for example, a CNRS researcher can request to move to any CNRS lab in France or abroad, whereas a faculty member is employed by a specific university).Just like for faculty appointments, there are no internal promotion from rank B to rank A.Instead, each year, national competitions are open to fill new positions, and it is necessary to participate in the national competition to move from one rank to the next.