Politicians and diplomats can state this in an agreement, but nothing happens on the ground until technical people from both sides get together and list how this can be achieved. And that is not happening. Pakistan has defined its command and control apparatus in a more lucid manner than anything New Delhi has done. Pakistan has also named the individuals on its national command authority, which consists of a strategic planning group and committees for nuclear use and nuclear development. India could be a little more transparent on this.
Deterrence requires a great deal of transparency.
These are weapons that are not meant to be used, therefore their capability should be fully advertised. The strength of the command and control over those weapons should also be advertised. Pakistan already has around 500kg of fissile material, indicating it probably has around 60 warheads. Estimates on India vary greatly, but a good guess would be around 150 warheads. For this you've got to have a submarine-based arsenal.