NEW YORK CITY — The United Nations Security Council is considering a draft resolution that would threaten Iran with sanctions or other measures unless it halts attacks on ships in the Strait of Hormuz, ceases imposing what the text calls illegal tolls, and discloses the placement of all mines in the waterway. The measure, co-sponsored by the United States and Gulf nations, was introduced as the Trump administration seeks to restore freedom of navigation through the strait.

The draft, prepared under Chapter 7 of the U.N. Charter, could be enforced militarily. It threatens "effective measures that are commensurate with the gravity of the situation, including sanctions" if Iran does not comply.

The resolution demands that Iran immediately participate in and enable United Nations efforts to establish a humanitarian corridor in the Strait of Hormuz to allow the delivery of vital aid, fertilizer and other goods. It also orders all other countries not to assist Iran in closing the strait or levying tolls, and reaffirms the right of all countries to defend their vessels from attacks and provocations. The text welcomes ongoing efforts to deconflict and coordinate safe and secure transit passage through the strait, expresses support for efforts to seek a durable peace in the region, and encourages member states in the region to strengthen dialogue and consultations regarding the waterway.

U.S. Ambassador Mike Waltz said he believes the new, narrow proposal will gain the necessary support to pass the 15-member council without triggering opposition or a veto from Iran's allies. China and Russia vetoed an earlier resolution aimed at opening the Strait of Hormuz hours before Washington and Tehran announced a temporary ceasefire in early April. That ceasefire remains in effect.

The Strait of Hormuz carried about 20% of the world's crude oil before the U.S. and Israel began the war on February 28.