The US Commerce Department is set to place export restrictions on Chinese telecoms equipment maker ZTE for alleged violations of US export controls on Iran.
The restrictions will make it difficult for the company to acquire US products by requiring ZTE's suppliers to apply for an export licence before shipping any American-made equipment or parts to ZTE.
According to a Commerce Department notice that will be published next week in the US Federal Register, the licence applications generally will be denied.
The restrictions will take effect Tuesday, and apply to any company worldwide that wants to ship American-made products to ZTE in China. Those companies are not the target of the export curbs on ZTE.
"This is a significant new burden on trade with ZTE," a senior official at the Commerce Department said. The official declined to comment on whether the US government might take further action against ZTE.
The company can appeal against the action.
ZTE, based in Shenzhen, said it had learned of the US export restrictions through media reports.
"ZTE is highly concerned about recent media reports relating to a US Department of Commerce investigation," the company said.
"ZTE has been working with associated US government departments on investigations since 2012 and maintains constant communication with associated departments and is committed to fully address and resolve any concerns."
The Commerce Department investigated ZTE for alleged export control violations following reports in 2012 that the company had signed contracts to ship millions of dollars worth of hardware and software from some of America's best-known technology companies to Iran's largest telecoms carrier, Telecommunication Co of Iran (TCI), and a unit of the consortium that controls it.
The US companies, which included Microsoft, IBM, Oracle and Dell, have all said they were not aware of the Iranian contracts. It is not clear if any of the companies still do business with ZTE.
Washington has long banned the sale of United States-made technology products to Iran. The Commerce Department's investigation focused on whether ZTE had acquired American products through front companies and then shipped them to Iran in violation of US sanctions.
Commerce Department investigators obtained internal ZTE documents -- some of which had been marked by the company as "top secret" -- outlining an alleged sanctions-busting scheme.
The senior Commerce Department official declined to comment on whether ZTE had implemented that scheme.
The ZTE statement did not provide comment relating to the documents.
In March 2012, a ZTE spokesman said the company would "curtail" its business in Iran. The company later issued a statement saying: "ZTE no longer seeks new customers in Iran and limits business activities with existing customers."
What effect the new export restrictions will have on ZTE's global business is not clear.
One undated internal ZTE document obtained by Commerce Department investigators states: "Our company has many technologies and components that came from suppliers in the US ... Lots of chips or software used in the products of our company are from US suppliers."
One of ZTE's websites also states that several leading US technology companies, including Microsoft, Intel, IBM and Honeywell, are "key strategic partners of ZTE". The terms of the partnerships are not described.
A spokeswoman for Microsoft said the company had a licensing agreement with ZTE but could not confirm if the Chinese company purchases other products, such as software. The other US companies did not respond immediately to requests comment.
The undated internal ZTE document also describes a proposal overseen by the company's legal department that describes ways to export American products subject to US sanctions by using shell companies to avoid getting caught.
"The biggest advantage" of one method is that it will make it "harder for the US government to trace it or investigate the real flow of the controlled commodities", the document states.
In its planned action against ZTE, the Commerce Department cites the proposal, stating that the company "planned and organized a scheme to establish, control and use a series of 'detached' companies to illicitly re-export controlled items to Iran in violation of US export control laws". It is not clear if the alleged scheme was implemented.
Another internal ZTE document from August 2011 that discusses "US export control risks" facing the company allegedly was signed by several top ZTE officials, including Shi Lirong, its president.
The document, marked by the company "top secret" and "No spreading abroad without permission of ZTE", begins "Dear company leaders".
It states that ZTE "has ongoing projects in all five major embargoed countries - Iran, Sudan, North Korea, Syria and Cuba", adding that "all of these projects depend on US-procured items to some extent, so export control obstacles have arisen".
The document goes on to cite "other risks" to ZTE, including its operations in the United States.
"R&D employees at the US research centres often travel between China and the US, carrying R&D data," it states, in an apparent reference to research and development. "This already severely violates the law."
The document does not specify what law may have been violated.
The company "needs to take preventative measures immediately, otherwise will face the risk of being investigated anytime," the document states.
The document also states that ZTE's Iran project "can potentially put us at risk of being put on the Blacklist by the US," and that such an eventuality could leave the company facing "the risk of losing the supply chain of US products".
ZTE is one of the world's largest telecom equipment makers with operations in 160 countries, according to its website. It also is a major manufacturer of mobile handsets. Founded in 1985, its shares trade on both the Hong Kong and Shenzhen stock markets.
Besides ZTE, the export curbs will apply to two of its Chinese affiliates, ZTE Kangxun Telecommunications Ltd and Beijing 8-Star, and an Iranian company, ZTE Parsian.