He added that for more than four months “Iran has denied us access to two locations and that, for almost a year, it has not engaged in substantive discussions to clarify our questions related to possible undeclared nuclear material and nuclear-related activities”.
Iran says the IAEA has no legal basis to inspect the locations. Activities at the two sites and a third are thought to have been from the early 2000s, before Iran signed the 2015 nuclear deal.
https://www.neweurope.eu/article/un-atomic-watchdog-head-calls-for-more-access-in-iran/