"250 members of parliament unanimously supported the plan regarding the Strait of Hormuz, and according to the leadership's formula, this strategic waterway is not subject to negotiation under any circumstances," he was quoted as saying.
He added that despite sanctions, Iran's oil exports have exceeded 1.6 million barrels, and today, Iran's oil has become practically "impossible to sanction."
"The Iranian nation will not retreat an inch from its demands," he added.
Opening the strait to all vessels (not only those Iran considers friendly) is the primary U.S. demand to end the war and forms a key part of the conditional plan for a two-week ceasefire agreed with Iran last week.
Closing the strait has led to a sharp rise in fuel prices and threatens to harm the electoral chances of Republicans in the November midterm elections.
U.S. military officials announced on Saturday that their forces "have begun setting conditions for mine clearance in the strait," with two guided-missile destroyers reportedly conducting operations. Iran, which closed the strait in response to the U.S. and Israeli attack on the country on February 28, denied that the two ships sailed in that area.