One definition of justice is the administration of law according to prescribed and accepted principles. Which means it varies according to who is doing the prescribing and who is doing the accepting, and as all should be aware it changes from one place to another.

Another is that which is handed down by a judge, magistrate or other person or body socially recognised as authorised to so do. Which of means such a person or body can not hand down injustice for that is a contradiction in terms.