When inspections are accompanied by adequate authority, aided by all available information, backed by a credible compliance mechanism, and supported by international consensus, the verification system works.
up to the (U.N.) Security Council, up to the members of the agency to take whatever measures to bring back North Korea into compliance with their non-proliferation obligation.
I hope they will understand that countries are not ready to negotiate under threat, or under blackmail and they should first take the first step to come into compliance with their non proliferation obligations.