The basis for Iran's cooperation with the International Atomic Energy Agency (IAEA) is rooted in a piece of legislation approved by the parliament and decisions made by the Supreme National Security Council (SNSC), as stated by the Iranian Foreign Ministry spokesman.
"The basis for our cooperation with the IAEA is a piece of legislation approved by the parliament and also the decisions by the Supreme National Security Council (SNSC)"
Foreign Ministry spokesman Esmaeil Baghaei clarified this during a briefing with reporters, addressing a question about a joint letter from Iran, Russia, and China to IAEA Director General Rafael Grossi, and Grossi's remarks on behind-the-scenes negotiations.
Author's summary: Iran's IAEA cooperation is based on parliamentary law.