(FOX NEWS) — Secretary of State Marco Rubio laid out President Donald Trump’s strategy amid peace negotiations with Iran, saying the reopening of the Strait of Hormuz is only a “prerequisite” for talks.

Rubio made the remarks during an appearance before the Senate Foreign Relations Committee on Tuesday, telling lawmakers that Iran must end its belligerence in the region.

“They have to announce, very clearly, the straits are now open, we’re not charging a toll, we’ll help remove the mines that they put in there, and they will not fire on ships,” Rubio said.

“In addition to the straits, that’s the predicate that opens the door to phase two. Phase two is they have to commit to very specific negotiations on highly enriched–the disposition of highly enriched uranium that still is buried deep in a mountain somewhere,” he continued, adding that Iran would have to agree to long-term limitations on its nuclear program.