The Supreme Court on Monday declined to hear Elon Musk's appeal over the terms of a settlement agreement with the Securities and Exchange Commission regarding his social media posts about Tesla.
Musk had argued that the agreement's provision that a company lawyer review his public communications about the car company violated his free speech rights.
Last year, an appeals court's rejected Musk's bid for the so-called "Twitter sitter" provision to be modified because it violated his First Amendment rights and was "unenforceable."
In December, Musk asked the Supreme Court to take up the case.
The Supreme Court's decision not to take the case means that the appeals court's ruling stands and the provision will remain in place.
Musk landed in hot water with the SEC in 2018 after he tweeted that he had "funding secured" to take Tesla private — a statement the SEC claimed was misleading.
Musk reached a settlement agreement with the SEC in 2018, which mandated that he get a Tesla attorney to pre-approve communications about the company, step down as chairman of the company and pay a $20 million penalty.