With these potential roadblocks, IAEA inspectors may be unable to finish their investigation into the potential military dimensions of Iran’s nuclear program.  While it may not be essential for Iran to provide a full mea culpa of its past activities, the access levels that Iran grants to the IAEA are indeed critical to our understanding of Iran’s progress toward a nuclear weapon.  If the IAEA is dissatisfied by December 15th, the JCPOA does not clearly provide for a delay of sanctions relief.