Since all your arguments seem to hinge on this … here is the Part II B of the truce agrement …
http://www.kashmiri-cc.ca/un/sc13aug48.htm
(1) When the Commission shall have notified the Government of India that the tribesmen and Pakistan nationals referred to in Part II A 2 hereof have withdrawn, thereby terminating the situation which was represented by the Government of India to the Security Council as having occasioned the presence of Indian forces in the State of Jammu and Kashmir, and further, that the Pakistan forces are being withdrawn from the State of Jammu and Kashmir, the Government of India agrees to begin to withdraw the bulk of their forces from the State in stages to be agreed upon with the Commission
So when the UNCIP informs India that Pakistani nationals have withdrawn COMPLETELY and Pakistan forces are being withdrawn, then India beings to withdraw … and if you read all the UN resolutions … non of them mention this condition having been met … hence India has not reduced its troops … So who is hiolding up the plebiscite in Kashmir:D