The ability to withdraw the authority to proceed is provided for in the legislation. It has been delegated to officials in the international assistance group. The considerations are the same considerations that would exist in issuing the authority to proceed in the first instance. We would consider whether there's sufficient evidence and whether it meets the requirements of the particular treaty before we issue an authority to proceed.
If the considerations that were taken into account in issuing the authority to proceed change, and no longer exist the way they did at the time the authority to proceed was issued, that would be the basis for withdrawing the authority to proceed.