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- Elon Musk broke labor law with a 2018 tweet about Tesla employees' stock options, a court ruled.
- The US 5th Circuit Court of Appeals said Musk threatened staff in the wake of a unionization drive.
- It also upheld the reinstatement by Tesla of a worker fired for leading unionizing efforts.
Elon Musk broke federal labor laws when he threatened to strip stock options from employees if they unionized, an appeals court has ruled.
The 5th Circuit US Court of Appeals upheld a previous ruling by the National Labor Relations Board (NLRB) that found Musk had made unlawful threats pertaining to employee remuneration.