Tritium is useful only if you can manufacture a fission weapon in the first place. The vast majority of anti-proliferation efforts are aimed at preventing fissi

Tritium is useful only if you can manufacture a fission weapon in the first place. The vast majority of anti-proliferation efforts are aimed at preventing fission weapons capability. Preventing a nuclear weapons state from graduating from fission weapons to boosted-fission or full two stage thermonuclear is a much lower priority.