The specific part about the Shimla agreement was that all disputes should be addressed mutually.
The question then and thereafter is whether or not Kashmir remains a dispute. It was not said in the pact that Kashmir no longer is a dispute, so in terms of the pact, Pakistan may still raise it as an issue, but with India directly.
Over and above this, some experts in international law state that the UN's resolutions cannot be voided by two member states agreeing mutually to solve their differences by themselves. While this is something they may implement by not referring any matter to the UN from that point onwards, it does not stop the UN from reminding these two states, separately and collectively, about its prior resolutions and asking about the implementation. Other experts differ.
According to my interpretation, the following is the status:
- Pakistan may ask India for action to resolve the dispute over Kashmir, or any other past or future dispute;
- India may ask Pakistan for action to resolve the dispute over Kashmir, or any other past or future dispute;
- Neither Pakistan nor India ought to approach the UN over Kashmir or any other past or future dispute;
- If either party does approach the UN for resolution of Kashmir or any other past or future dispute, it will at that point be in breach of treaty, and the other party may claim to have been damaged by this action.
- The question is, how is this damage to be rectified or repaired? There is no provision for payment of indemnity, nor would such a thing be enforceable.
- The party suffering damage can only enforce its claims by waging war and winning it, and enforcing payment of a war indemnity.
- It is also not clear whether any member of the UN can by treaty abnegate its right of reference to the UN Security Council or the General Assembly.
- The UN may at any time remember its Resolutions and call the parties to implement those.
So Pakistan is in breach of the Treaty by referring the Kashmir matter to the UN; Pakistan has not committed any breach of the treaty in calling Kashmir a disputed issue, disputed between the two nations, and has not committed any breach of the treaty in calling on India to take action to resolve the dispute. How India is to claim damages from Pakistan for this breach of treaty, and enforce those claims short of war and subsequent victory, is not clear.
The UN, despite its right to recollect the Resolutions and to refer these to the parties concerned, has clearly, through its Secretary General, indicated its willingness to intercede, in the person of its Secretary General, if both parties wish the UN to do so, or wish him directly to do so. In effect, the UN seems to have abnegated its ability to recall the Resolutions.
A very untidy state of affairs.