international ret

"The World Court (formerly the International Court of Justice) is the juridical arm of the members of both the Security Council and General Assembly.
It's weakness are that it can attribute only when states choose to refer their disputes to the court, and only about third of UN member states are prepared to acknowledge its jurisdiction."
 

Kan man bruge international retsafgørelser efter behag, hvis ja, hvad er så formålet med at have den?