Jammu and Kashmir has had so many general elections and elected governments that any attempt at plebiscite will now be a self-defeating idea

First Indian Prime Minister Jawaharlal Nehru is often belittled for internationalising the Jammu and Kashmir context after the Pakistani Kabaili's aggression and invasion in Kashmir and Jammu regions in the last week of October 1947. These invaders had entered up to Samba in Jammu; and Srinagar in Kashmir (only about 10 miles away from Srinagar). Maharaja Hari Singh had signed the Instrument of Accession into Indian Union on October 26, 1947 -- though such Instrument was not needed in view of centuries-old historical evidence about Kashmir having been an integral part of India (quite like the entire territory of Pakistan before partition).
Indeed, after signing of the Instrument of Accession, India sent its army to deal with aggressors. The invaders were being pushed back successfully by the Indian Army. But suddenly, a unilateral ceasefire was declared by the Government of India. It is this act of ceasefire that led to the creation of Pak occupied Jammu and Kashmir (PoJK). Hence, since then, the Pakistani Army is occupying that part of Indian Kashmir which the declaration of ceasefire ipso facto left with them. This occupation of Jammu and Kashmir by Pakistan is there even now. Continuing to live with this occupation is an utter failure of the Indian Government.
Nehru is responsible - apparently on the advice of the then Viceroy/Governor General of India, Lord Mountbatten - to internationalise this invasion in the wrong ways.
First, he chose to broadcast his intention of going to the United Nations on All India Radio though Sardar Patel sent his emissary to stop Nehru from doing this. But lo and Nehru had his way with the broadcast. Secondly, Nehru took this matter to UN under Chapter VI of the United Nations Charter. This chapter relates to 'a dispute' and not an invasion by another country's armed men.
This was a grave blunder by Nehru. He actually converted an 'invasion and aggression' into a dispute. While in reality, it was an invasion of Indian territory by the Pakistani armed Kabailis. Instead of Chapter VI of the UN Charter, Nehru should have gone to the UN - if at all necessary - under the provisions of Chapter VII of the UN Charter that deals with aggression and invasion of a country.
Even relevant portions of Article 370 (duly removed on August 5, 2019) and later Presidential Order known as 35 A (also duly revoked on August 5, 2019 suo moto) in Annexure of the Constitution of India were formulated mainly to strengthen the so-called erstwhile and fabricated 'disputed territory' perspective of the Jammu and Kashmir question. Nehru's misperceptions and personal linkages reigned over his political wisdom quite often. That is why India has suffered in so many other contexts of inner contradictions of Nehruvian 'socialist democracy', 'mixed economy' and slanted 'secularism', etc.
Nehru had had deep friendly and emotional links with the Mountbattens. Perhaps, despite being an intelligent person and erudite scholar and writer, Nehru could not see the politically and strategically harmful undercurrents behind his broadcast on All India Radio and his piquant decision of converting the Jammu and Kashmir question into a dispute that never was.
Almost similar strategic blunder Nehru committed when China attacked India in 1962. Nehru indeed remained an innocent and emotional leader having faith in formal and informal human relations and understandings. He missed the political acumen needed in international affairs. So
it appears.
Hence, Pakistan as an aggressor cannot claim even an inch of territory in Jammu and Kashmir. Moreover, the concerned UN Resolution of 1948 clearly says that first, all foreign forces have to be withdrawn from the area, known as Pakistan occupied Jammu and Kashmir. Then only a plebiscite may be conducted.
As regards plebiscite, India's Jammu and Kashmir has had so many general elections and elected governments that any plebiscite will now be a self-defeating idea. Once, the Pakistani Army withdraws its illegal occupation from Jammu and Kashmir, it is apparent that the Indian government will conduct democratic elections there as well. As such, there is no need for a plebiscite now.