Iran Sanctions Get Treasury's Latest Overhaul
Published Date: 9/30/2026
Rule
Summary
The U.S. Treasury just updated rules that affect anyone doing business with Iran, tightening sanctions to block Iran’s funding for nuclear weapons and terrorism. These changes include new definitions and exemptions based on a 2020 executive order, and they kick in starting September 30, 2026. If you’re involved in trade or finance linked to Iran, watch out—these rules could impact your deals and money flow.
Analyzed Economic Effects
8 provisions identified: 3 benefits, 5 costs, 0 mixed.
New sectoral blocking for Iran-linked actors
Starting September 30, 2026, OFAC will block all property and interests in property in the U.S. or controlled by U.S. persons of any person the Secretary of the Treasury (in consultation with the Secretary of State) determines operates in the construction, mining, manufacturing, or textiles sectors of the Iranian economy, or in any other sector later determined by the Secretary.
Prohibition for significant Iran trade since Jan 10, 2020
Any person the Secretary of the Treasury determines to have knowingly engaged, on or after January 10, 2020, in a significant transaction for the sale, supply, or transfer to or from Iran of significant goods or services used in connection with the specified sectors may have their property and interests in property blocked under the rule effective September 30, 2026.
Blocking for aiders, affiliates, and controllers
The rule allows blocking of persons who materially assisted, sponsored, or provided financial, material, or technological support for, or goods or services to or in support of, persons blocked under the rule, and persons owned or controlled by, or acting for or on behalf of, such blocked persons.
Criminal liability for willful violations
Willful violations of the regulations in this final rule may be subject to criminal penalties pursuant to 50 U.S.C. 1705; the statutory authority requires mens rea of willfulness, as noted in the rule's discussion of Executive Order 14294, effective September 30, 2026.
Humanitarian sales to Iran remain allowed
The prohibitions do not apply to persons conducting or facilitating transactions for the provision (including any sale) of agricultural commodities, food, medicine, or medical devices to Iran (humanitarian transactions) as specified in Sec. 560.210(g), effective September 30, 2026.
Broader 'Iran' definition for certain provisions
For purposes of Secs. 560.210(g) (humanitarian transactions) and 560.211(c)(1)(iii) (E.O. 13902-related blocking), the term "Iran" is defined to include the Government of Iran in addition to territory and marine areas, per the revised Sec. 560.303(b), effective September 30, 2026.
Official U.S. government business exempted
The prohibitions in specified paragraphs do not apply to transactions for the conduct of the official business of the Federal Government by employees, grantees, or contractors thereof (Sec. 560.210(e)), effective September 30, 2026.
United Nations official-business exemption
The prohibitions in Sec. 560.211(c)(1)(iii) do not apply to transactions for the conduct of the official business of the United Nations (including its specialized agencies, programmes, funds, and related organizations) by employees, grantees, or contractors thereof, as added in Sec. 560.210(h), effective September 30, 2026.
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Key Dates
Department and Agencies
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