Huawei challenges US defence Bill as war on sanctions intensifies

China’s Huawei Technologies Co Ltd has filed a legal motion seeking to declare a U.S. defense law unconstitutional, in the telecom equipment maker’s latest bid to fight sanctions from Washington that threaten to push it out of global markets.

The motion for summary judgment in its lawsuit against the U.S. government, filed late on Tuesday in the U.S. District Court for the Eastern District of Texas, asks a judge to declare the 2019 National Defense Authorization Act (NDAA) unconstitutional. Huawei filed its lawsuit in March.

The NDAA bill, passed by the US Congress last summer, places a broad ban on federal agencies and their contractors from using Huawei equipment on national security grounds, citing the company’s ties with the Chinese government.