Likewise, I think Rheinland, likely the most, shall we say, lenient when it comes to human rights house, would sooner start dismantling their military then recognize a Liberty based court of law as superior to their own.
However, the possibility of internal house courts and indeed the general implementation of court systems (both criminal tribunals, court martials, civil courts and criminal courts) could be a very interesting path. But taking it to Sirius level is too much of a stretch, especially across all factions.