Your wikipedia link doesn't cover the UN resolution, nor does the citation, which appears to be ICRC's commentary of the treaty. The article you linked does assert it, but without any significant support aside from the ICRC's commentary.
I'm glad I could help.
My personal heuristic to avoid grief in the future: Don't discuss with anyone that dismiss Wikipedia without references... no, without having primary sources for references.
Thank you for that. The net and HN will be better for me.
(Edit: The UN and the UN Security council make resolutions all the time. I doubt a majority are followed. :-) E.g. http://articles.latimes.com/2002/oct/17/world/fg-resolution1... )