The link you added says "DU munitions are nonetheless legal under international humanitarian law." This is in contrast to your previous opinion that their use is "in contravention of international law."
Thanks for your time. Enjoy the rest of your day.
I agree, DU munitions are not illegal. Weapons that cause unnecessary suffering are illegal. The question is whether DU munitions cause unnecessary suffering, and whether the US knew that the caused unnecessary suffering.
Ultimately the question is not of great importance because no one actually enforces international law.
Have a nice day :) (said sincerely, without irony)
If you want to labour the point, here's the specific law: https://ihl-databases.icrc.org/customary-ihl/eng/docs/v1_rul...
I'd consider birth defects to be "unnecessary suffering" (this exact wording was used in the Guardian article).
The topic is elaborated on here: Here's an additional link: http://www.austlii.edu.au/au/journals/VicULawJJl/2015/6.html