Even UNSC resolutions are non binding … but India and Pakistan have agreed that Kashmir issue is to be resoved as per UNCIP resolutions … and it is mentioned in the UNSC resolutions. This was last time Kashmir was discussed in UN security council
http://www.kashmiri-cc.ca/un/sc2dec57.htm
Observing further that the Governments of India and Pakistan recognize and accept the commitments undertaken by them in the resolutions of the United Nations Commission for India and Pakistan dated 13 August 1948 and 5 January 1949, which envisage the determination of the future status of the State of Jammu and Kashmir in accordance with the will of the people through the democratic method of a free and impartial plebiscite, and that Mr. Jarring felt it appropriate to explore what was impeding their full implementation
But knowing your track record of understanding international agreement … i am not surprised by your reaction … you are the one who claims it is illegal for India to use western rivers 