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E.O. 13902 (signed 10 January 2020) authorises secondary sanctions against foreign persons operating in any sector of Iran's economy that the Secretary of the Treasury, in consultation with the Secretary of State, designates as of strategic concern. The 11 October 2024 determination invokes that authority for the petroleum and petrochemical sectors — adding the single most cash-generative sliver of Iran's economy to the sectoral target list. The determination was technically effective on issuance (11 October 2024); the 19 November 2024 Federal Register publication is the procedural step that establishes the determination on the public record and locks in its full enforceability against non-US counterparties.
Section 1(a)(i) of E.O. 13902 blocks all property and interests in property within US jurisdiction of any person OFAC designates as operating in a covered sector. The downstream secondary-sanctions exposure runs through the foreign-financial-institution (FFI) and "significant transaction" provisions of the order: non-US persons — including refiners, traders, shipping operators, P&I insurers, and correspondent banks — that knowingly engage in significant transactions to or from Iran's petroleum or petrochemical sectors can be SDN-listed under E.O. 13902 §1(a)(ii)–(iii). The action also expands OFAC's ability to designate non-US persons providing material assistance or goods/services in support of any party already SDN-listed under E.O. 13902.
The accompanying 11 October 2024 designations targeted Sepehr Energy Jahan Nama Pars and a multi-jurisdictional network (UAE/Hong Kong/PRC front companies and vessel operators) that had been shipping Iranian crude on behalf of the Armed Forces General Staff to Chinese refiners, establishing a template for downstream petroleum-network SDN waves through 2025-26.
This action closes the last major non-financial perimeter that E.O. 13902 had not yet explicitly named. Before 11 October 2024 the sectoral list under §1(a)(i) was: construction (2019), mining (2019), manufacturing (2019), textiles (2019), and financial services (2020). Petroleum and petrochemicals had been targeted under separate authorities (CISADA, NDAA 2012, the post-JCPOA snap-back architecture) but had never been brought directly into the §1(a)(i) sectoral- determination framework. Bringing them in unifies the secondary- sanctions perimeter under a single Trump-1.0-era EO and provides the legal scaffolding for the post-NSPM-2 (2025-02-04) maximum-pressure enforcement wave: every petroleum-network SDN listing from late 2024 onward — including the Hengli shadow-fleet designations (2026-04-24-us-ofac-hengli-iran-shadow-fleet-designations) and the May-1 designations (2026-05-01-us-ofac-iran-may-1-designations-gl-w-hormuz-alert) — cites this determination as its underlying §1(a)(i) authority.
US refiner, trader, shipper, or insurer that knowingly transacts with Iranian petroleum / petrochemical counterparties — a perimeter that Trump-2.0 enforcement (post-NSPM-2) has been operationalising at pace through 2025-26.
flag-of-convenience registries servicing Iranian crude exports; feeds into the OFAC vessel-blocking cadence visible in SB0322, SB0341, SB0405, SB0472, and SB0090.
knowingly processing Iran-petroleum-linked transactions — compounds the structural drag from the 2020 financial-sector determination (responds_to).
tariff authority (2026-02-06) which provides supplementary tariff exposure on top of the §1(a)(i) SDN exposure established here.
trade that has historically been parsed separately from "petroleum"? Public OFAC guidance through FAQs 1183-1196 suggests yes, but the perimeter on petrochemical-feedstock derivatives (e.g., MEG, paraxylene) remains case-by-case.
secondary-tariff authority? §1(a)(i) provides SDN exposure; EO 14382 layers tariff exposure on top — overlapping but distinct enforcement modalities for the same petroleum perimeter.
petroleum-services / oilfield-equipment exports (currently captured via BIS Entity List additions rather than OFAC sectoral determination)?