The ICJ’s Opinion is Only Advisory
There seems to be a lot of confusion among journalists as to the purpose and status of advisory opinions in international law. This is hardly surprising, as the pro-Israel lobby alleges that advisory opinions are only advisory and can therefore be ignored with impunity. But this is simply not the case.
It is true that unlike judgements of the International Court of Justice, advisory opinions are only consultative and not binding as such on the requesting body. This is because their purpose is to provide authoritative guidance on points of law arising from the functions of organs and specialised agencies of the UN.
But in reality, there is no difference between a ‘non-binding’ advisory opinion and a ‘binding’ judgement. Although the requesting body is not legally obliged to do what the ICJ says, in practice it normally does so.
Blaine Sloan - Professor Emeritus of International Law and Organization at Pace Law School, and a noted expert on UN law with decades of experience as director of the UN General Legal Division - made this point in an article he wrote in 1950:
“While in a formal sense it may be true that an opinion does not have the binding force of a judgement, practically, it does, as an authoritative statement of law, have almost the same legal effect.”
André Gros, formerly a French judge at the ICJ and a member of the UN War Crimes Commission during World War II, took a similar view:
“The distinction habitually drawn between advisory opinions and judgements, whereby the former do not have the binding character of the latter, is not an absolute one.”
The ICJ is the principal judicial organ of the UN. There is no higher authority that can rule on the legal issues involved in this case.
Even if this had been a contentious case between Israel and Palestine, or between a third state such as Jordan doing what Ethiopia and Liberia tried to do regarding South West Africa in the 1960s, the result would have been the same - although in a contentious case Israel would have probably put in full evidence and arguments on the merits.
It should be noted that two of the obligations mentioned by the ICJ in its advisory opinion are binding in and of themselves. These are called obligations erga omnes, which are concerned with the enforcement of international law, the violation of which is deemed to be an offence not only against the state or entity in question, but against all members of the international community.
These obligations of an erga omnes character which the ICJ referred to are the Palestinian people’s right to self-determination, and certain unspecified obligations under international humanitarian law.
It is therefore incorrect to say that the ICJ’s opinion is only advisory. Rather, it is a statement of what the law is today by the world’s most authoritative judicial body.
For further reading:
Blaine Sloan, “Advisory Jurisdiction of the International Court of Justice,” in volume 38 of the California Law Review published in 1950 at pp. 830 – 859 at p. 855.
André Gros, “Concerning the Advisory Role of the International Court of Justice,” in Friedmann, Henkin and Lissitzyn (eds.) Transnational Law in a Changing Society: Essays in Honor of Philip C. Jessup (New York: Columbia University Press 1972) pp. 313 - 324 at p 315.