In an email to VOA, Kevin Wolf, former head of the Commerce Department's export control section, said the rule thus expands the scope of the Export Administration Regulations (EAR) Entity List-related prohibitions "over otherwise uncontrolled foreign-made commodities, software, and technology outside the United States related to computers, telecommunications, and electronics, particularly semiconductors, in Huawei's contract manufacturing supply chain." Huawei has in recent years successfully developed five series of chips that are used in different products. Huawei has used Taiwan's chipmaker TSMC to fabricate some of its key components, and under the new restriction, Huawei's access to TSMC could be limited.