International human rights law (IHRL) is the body of international law designed to promote human rights on social, regional, and domestic levels. As a form of international law, international human rights law are primarily made up of treaties, agreements between sovereign states intended to have binding legal effect between the parties that have agreed to them; and customary international law. Other international human rights instruments, while not legally binding, contribute to the implementation, understanding and development of international human rights law and have been recognized as a source of political obligation.
The relationship between international human rights law and international humanitarian law is disputed among international law scholars. This discussion forms part of a larger discussion on fragmentation of international law. While pluralist scholars conceive international human rights law as being distinct from international humanitarian law, proponents of the constitutionalist approach regard the latter as a subset of the former. In a nutshell, those who favors separate, self-contained regimes emphasize the differences in applicability; international humanitarian law applies only during armed conflict.
A more systemic perspective explains that international humanitarian law represents a function of international human rights law; it includes general norms that apply to everyone at all time as well as specialized norms which apply to certain situations such as armed conflict between both state and military occupation (i.e. IHL) or to certain groups of people including refugees (e.g. the 1951 Refugee Convention), children (the Convention on the Rights of the Child), and prisoners of war (the 1949 Third Geneva Convention).