Detainees who are on remand for one cause and convicted for another shall be subject to the same regime as convicted prisoners, except that they shall benefit from the advantages and facilities granted to remand prisoners for the purposes of their defence.
Unless otherwise decided by the magistrate referred to in Article R. 57-5, they may be detained in penal institutions.
This magistrate has the same prerogatives with regard to them as those provided for by this code for untried prisoners.