U.S. President Donald Trump said in an April 8 Truth Social post that any country supplying Iran with "military weapons" would be immediately subject to a 50% tariff, without specifying the authority under which the tariff would be implemented. He also stated that Iran had agreed to many of the 15 points of a U.S.-proposed peace plan, despite having said the previous day that Iran's own 10-point proposal would serve as the basis for negotiations.