It is easy for us to discuss on a forum about implementing UN resolution, but it is a totally different proposition in reality. Here are my reasons why UN resolution is either not implementable or not relevant
First, before any UN resolution to happen, all the parts of Kashmir under the control of India (43%
, Pakistan (37%), and China (20%) have to be brought together. But the official positions of all the governments make it impossible to bring all the parts together: India's official position is that Kashmir is an integral part of India. Pakistan's official position is that Kashmir is a disputed territory and China's official position is that Aksai Chin is a part of Tibet; Moreover, Pakistan has unilaterally ceded a part of Kashmir to China ignoring the ‘disputed’ nature of territory and in the process making it more complicated
Second, the resolution was passed by UN Security Council under chapter VI of UN charter. Any resolution passed under chapter VI are considered non binding and have no mandatory enforceability.
Third, the execution of the UN resolution might create more serious difficulties than were foreseen at the time the parties agreed to. National identities are much stronger in both India and Pakistan than compared to National identities in 1947. Moreover, India and Pakistan have invested lot of blood and money in the last 60 years. The question of Kashmir has become the question of national identities and prestige.
Fourth, Kashmir is not a homogeneous region; it has Kashmir, Jammu, Ladakh, Aksai Chin and PAK. The question is how UN resolution is going to take care of aspirations of each of the regions; moreover there is another question of the aspiration of Kashmiri Pundits.
Fifth, India is a secular country and hugely diverse. Accepting UN resolutions on Kashmir (Muslim-majority state) mean reject the very foundation of India that is secularity. Moreover this could be a Pandora Box (other demands for states on ethnicity, religion and caste could arise)
Lastly, India is too big a country to be forced.
Criticism is welcome, but has to be logical