Ancient Latin legal maxim literally meaning "concerning (the) law of (the) blood of crowns". Since the end of the 16th Century, royal or noble blood have used this term to claim a number of unique rights -- in particular to the freedom of their body, protection of property and the obligation of any matter brought against then to yield to their claimed superior status. As the term and associated rights (or ius) contradicts the Golden Rule (all are equal according to the Rule of Law, Justice and Due Process), the use of such terms contradict the principles of Ucadia and proper Law.