"Zarif expressed astonishment that some members of US Congress find it appropriate to write to leaders of another country against their own President and administration. He pointed out that from reading the open letter, it seems that the authors not only do not understand international law, but are not fully cognizant of the nuances of their own Constitution when it comes to presidential powers in the conduct of foreign policy." - Andrew C (see frenf.it)

"Foreign Minister Zarif added that "I should bring one important point to the attention of the authors and that is, the world is not the United States, and the conduct of inter-state relations is governed by international law, and not by US domestic law. The authors may not fully understand that in international law, governments represent the entirety of their respective states, are responsible for the conduct of foreign affairs, are required to fulfil the obligations they undertake with other states and may not invoke their internal law as justification for failure to perform their international obligations." - Andrew C (see frenf.it)

"The Iranian Foreign Minister added that "change of administration does not in any way relieve the next administration from international obligations undertaken by its predecessor in a possible agreement about Irans peaceful nuclear program." He continued "I wish to enlighten the authors that if the next administration revokes any agreement with the stroke of a pen, as they boast, it will have simply committed a blatant violation of international law."" - Andrew C (see frenf.it)

"Zarif expressed the hope that his comments "may enrich the knowledge of the authors to recognize that according to international law, Congress may not modify the terms of the agreement at any time as they claim, and if Congress adopts any measure to impede its implementation, it will have committed a material breach of US obligations." - Andrew C (see frenf.it)