[PJDK]

The NPT works the other way around. It is a bargain between the nuclear weapons powers and the non-weapon powers. Non-weapon powers get access to civilian nuclear technology and know-how in exchange for a promise (and safeguards) to not develop weapon systems. Additionally weapon powers agree to negotiate towards an end to all nuclear weapons (but in a very woolly, no real commitment kind of way).

Non signers get no access to any technology or know-how from signers but are free to act as they please. Israel, Pakistan and India all fall into this category. They can act as they please.