1The task of an expert may not be carried out by:
aa minor, the one who is legally denied or whose legal capacity to act has been removed or the one who suffers from a mental illness;
bthe one who is suspended, even temporarily, from public duties or from practising a profession;
cthe one against whom personal precautionary measures have been ordered;
çthe one who may not be questioned as a witness or taken as an interpreter or is entitled to decline to testify or interpret.