It doesn't change the fact that the Strait's still closed, and my service members, and all of our service members, are still in harm's way," representative Sara Jacobs of California told Rubio.Rubio updated legislators on negotiations with Iran, saying the Islamic republic's highly enriched uranium stockpiles were at the centre of discussions and that Iran has not yet agreed to a peace deal.The US insists Iran must turn over its near-weapons-grade enriched uranium, agree to curb its nuclear activities and re-open the Strait of Hormuz for any peace agreement to take hold."I think now, in some of the papers that have been exchanged back and forth, it's clearly addressed, but we .. still don't have final sign off from their system as of this morning," Rubio told the House committee.Iran has said it needs the release of U$12 billion ($16.8 billion) in frozen assets before engaging in substantive talks on its nuclear program, and dismissed earlier comments by US President Donald Trump who suggested that its stockpile of enriched uranium would ultimately be destroyed.For the latest from SBS News, download our app and subscribe to our newsletter.