The U.S. Department of Commerce on Sunday published guidance intended to end a gap that may have allowed the world's most advanced AI chips to reach Chinese companies via subsidiaries located outside China. The guidance specifically references high-end processors including Nvidia's Rubin and Blackwell chips and AMD's MI350x.
According to the Commerce Department posting, the agency will now require export licenses for advanced chips destined for entities with headquarters in China, even if those entities receive shipments at facilities outside Chinese territory. The guidance, released over the weekend, was described by officials as an effort to close a potential loophole that had existed for roughly a year.
It is not clear how many of the leading-edge chips may have been exported during the period when the opening existed. One chip industry source with deep supply-chain knowledge estimated that the quantity could be in the hundreds of thousands, but the Commerce Department did not immediately respond to a request for comment about the estimate. Nvidia and AMD also did not immediately reply to requests for comment.
The Commerce Department's action follows a May 2025 announcement in which the department said it would not enforce the AI Diffusion rule that had been issued in the final days of the previous administration. That decision created the regulatory opening that the new guidance aims to close. The AI Diffusion rule governed global access to AI chips, and the reversal left room for advanced processors to be exported to subsidiaries of Chinese firms located in other countries.
Industry observers said the guidance was unexpected in timing, coming on a weekend. The department's stated approach is to treat entities headquartered in China as subject to the license requirement even when their operational location is outside China. In practical terms, that means overseas subsidiaries of Chinese AI companies will need U.S. licenses to receive the most advanced chips if their parent companies are based in China.
Notably, the guidance does not direct data centers to stop using affected chips or require them to cease maintenance or servicing of existing advanced computing equipment such as servers. That element leaves in place the ability of facilities to continue operating hardware already deployed, while tightening the pathway for future shipments.
Technology expert and former State Department official Chris McGuire commented on the development in a social media post on Sunday, calling the situation "a HUGE problem." McGuire said the loophole had allowed overseas subsidiaries of Chinese companies to acquire Nvidia Blackwell chips without a license and added, "Chinese companies have been buying these chips, very likely at scale."
The Commerce Department posting did not offer an estimate of how many shipments might have taken place since the earlier decision not to enforce the AI Diffusion rule. The department also did not immediately answer follow-up inquiries about enforcement timeline or whether any retrospective licensing reviews would be launched.
The new guidance signals a shift toward stricter enforcement of export controls tied to national security concerns around advanced AI compute. While it tightens the flow of hardware to entities with Chinese headquarters, it leaves intact the ability of data centers to operate and service existing equipment.
Summary
The Commerce Department has posted guidance enforcing license requirements for advanced AI chips to entities headquartered in China even when they are located outside China. The move addresses a year-long gap created after the department opted not to enforce the AI Diffusion rule in May 2025 and targets high-end Nvidia and AMD processors. The guidance does not force data centers to stop using or servicing deployed systems.
Key points
- Commerce will require export licenses for advanced chips sent to entities headquartered in China even if the receiving facility is outside China - impacts semiconductors and export-control policy.
- The guidance specifically names top-tier processors such as Nvidia's Rubin and Blackwell series and AMD's MI350x - affects chipmakers and AI hardware supply chains.
- Data center operations and maintenance are not suspended under the guidance - cloud and data-center service providers are affected differently than hardware exporters.
Risks and uncertainties
- Unclear scope of prior exports - one industry source estimated shipments could be in the hundreds of thousands, but the Commerce Department has not confirmed numbers - creates uncertainty for suppliers and compliance teams in the semiconductor sector.
- Potential enforcement questions remain unresolved - the department did not outline whether it will pursue retrospective reviews or enforcement actions for chips already shipped, leaving legal and regulatory ambiguity for exporters and intermediaries.
- Operational impacts may vary across regions - while data centers can continue using and servicing equipment, the new license requirements could disrupt future procurement and planning for cloud operators and AI service providers.