Correction: An earlier version of this article suggested that, under the new bill: "The transfer and provision of crude oil, condensates, refined petroleum, or other types of petroleum or petroleum byproducts would also be made illegal". In fact, the bill would only give the President the authority to block such transfers, and is not an outright ban.

New and tougher legislation strengthening sanctions against North Korea has been introduced to the U.S. House of Representatives, Foreign Affairs Committee Chairman Ed Royce said on Tuesday in a written statement.