Huawei submitted a timely request to the Bureau of Industry and Security at the Department of Commerce in advance of completing the purchase in May and the Department of Commerce certified that no license was required to export the 3Leaf technology.

FORBES: Huawei's Open Letter To U.S. Investigators

Technical military data covered by US export regulations cannot be taken out of the country without a license.

BBC: US jails Chinese engineer for exporting trade secrets