Caught Between Two Regimes: China's Blocking Order Meets OFAC's Maximum Pressure on Iran

On May 1, 2026, the Treasury Department's Office of Foreign Assets Control designated a network of entities, individuals, and vessels supporting Iran's petroleum exports. Among the targets was Qingdao Haiye Oil Terminal Co., Ltd., a Chinese port operator accused of receiving sanctioned Iranian crude since the announcement of National Security Presidential Memorandum 2 in February. The following day, China's Ministry of Commerce did something it had never done before: it issued a formal blocking order prohibiting compliance with the U.S. measures inside Chinese jurisdiction.

For companies operating on both sides of that divide, these are not two separate news items. They are the two halves of a legal trap.

A Campaign, Not a Single Action

The May 1 designations were not an isolated enforcement event. They are part of a sustained pressure campaign that has been building since February, and the cadence matters as much as the content. OFAC has issued alerts aimed at Chinese independent refineries — the so-called teapots that have absorbed a growing share of Iranian crude — and has clarified through published guidance that payments made to the Islamic Revolutionary Guard Corps for transit through the Strait of Hormuz are prohibited, closing off an argument some shippers had been prepared to make.

Read together, the actions describe a strategy of targeting the physical and financial infrastructure that makes Iranian oil exports work: the terminals that receive it, the vessels that carry it, and the intermediaries that pay for it. Chinese logistics nodes are no longer incidental to that strategy. They are the point of it.

What Beijing's Blocking Order Actually Does

China adopted its Blocking Measures — formally, the Measures for Blocking the Improper Extraterritorial Application of Foreign Laws and Measures — in January 2021, but until May 2026 had never invoked them to issue an operative order. The May 2 order changes that. It prohibits recognition of, and compliance with, the U.S. sanctions authorities underlying the Iranian oil designations.

The distinction between the 2021 framework and the 2026 order is the distinction between a loaded weapon and a fired one. The framework established a reporting-and-prohibition mechanism that had sat unused, functioning mainly as a deterrent signal. The order activates it against a named set of foreign measures. Chinese entities are now subject to an affirmative domestic legal prohibition on doing what U.S. law affirmatively requires.

The Conflict-of-Laws Trap

For a multinational with a Chinese subsidiary, a Chinese joint venture partner, or a Chinese counterparty, the exposure is structural rather than theoretical. Consider a shipping agent with a Shanghai entity and a U.S. parent. Its U.S. obligations require it to cease dealings with the designated terminal and to block property in which the designated parties hold an interest. Its Chinese entity is now prohibited from giving effect to precisely those obligations.

There is no clean answer. Compliance with one regime is, on its face, a violation of the other. What varies is which exposure a company can survive, and how well it can document that it took the conflict seriously rather than choosing the convenient side.

Three practical realities shape the analysis. First, the U.S. secondary-sanctions risk attaches to the global group, not only to the U.S. entity — designation is an existential outcome for a financial institution or a trading house. Second, Chinese enforcement of the blocking order remains discretionary and, so far, unproven; the order creates legal risk without yet establishing an enforcement pattern. Third, silence is the worst posture: a company that simply stops responding to counterparties has neither complied with U.S. law nor availed itself of any Chinese exemption process.

Steps to Take While the Wind-Down Window Is Open

OFAC issued a general license authorizing wind-down activity for transactions involving the newly designated parties. Wind-down authorizations are narrow, time-limited, and unforgiving of sloppy execution. Before it closes:

• Map every commercial relationship touching the designated terminals, vessels, and entities, including through chartering agents, freight forwarders, and insurance intermediaries.
• Identify which group entities sit within Chinese jurisdiction and are therefore exposed to the blocking order, and which sit outside it.
• Document the wind-down decision-making contemporaneously — who decided, on what legal advice, and on what timeline. This record is the single most valuable asset in any future enforcement proceeding.
• Escalate blocked-property determinations to counsel rather than resolving them at the operational level, and file required reports on time.
• Brief the board explicitly on the conflict of laws. This is a category of risk that cannot be delegated to the compliance function, because the resolution involves accepting one legal exposure to avoid another.

The Bigger Picture

The significance of May 2 is not that one order was issued. It is that Beijing has now demonstrated a willingness to use a legal instrument it had held in reserve for five years, and it did so in response to sanctions aimed at Chinese commercial infrastructure rather than at Chinese foreign policy.

That combination suggests the pattern will repeat. Companies that treat this as an Iran problem are scoping it too narrowly. It is the first working example of what compliance looks like when two major economies issue directly contradictory commands to the same corporate group — and it will not be the last.