_Every_ CEO of _every_ publicly traded company has _every_ company-related tweet vetted by a company lawyer. What the SEC is asking of Musk here is simply that he follow the industry-standard.

Let's not forget Musk owes a fiduciary duty to Tesla shareholders and his tweets have repeatedly lost shareholders money and induced people to purchase shares on false/misleading information. That's securities fraud.

Source: Corporate & Securities Attorney. I was once the approver of many such tweets. Though thankfully the people I worked with were exceedingly reasonable in comparison to Musk.

Edit: Missed a word.