This is a moral principle in medical ethics.
Justice is often regarded as being synonymous with fairness and can be summarised as the moral obligation to act on the basis of fair adjudication between competing claims.
In health care ethics it is useful to subdivide obligations of justice into three categories
1. fair distribution of scarce resources (distributive justice)
2. respect for people's rights (rights based justice),
3. and respect for morally acceptable laws (legal justice)
Gillon R. Medical ethics: four principles plus attention to scope. BMJ 1994;309:184.