This time around, it is the US that needs to prove their commitment to JCPOA for Iran and the remaining partners in order to restore faith.
They must start by:
1. Re-joining the JCPOA
2. Lift all UN and unilateral sanctions (including import/export of arms)
3. Re-integrate Iran to SWIFT for international banking transactions
4. Approve licence for the delivery of all remaining Boeing and Airbus passenger planes ordered
5. Un-freeze all US and foreign-based Iranian assets (including Iranian banks abroad)
6. Remove visa ban for all Iranian citizen
7. Allow unconditional export of Iranian oil
8. Let Iran export excess enriched uranium to Russia for storage
AND THEN...the US can REQUEST Iran to fully comply with the Nuclear Deal!
PERIOD