If it was not already clear, securities regulators are giving Elon Musk, the chief executive of Tesla, a laundry list of things he cannot riff about on Twitter.

A revised agreement between Mr. Musk and the Securities and Exchange Commission, filed in federal court in Manhattan on Friday, spells out just when Mr. Musk must “obtain the preapproval of any experienced securities lawyer” employed by Tesla before posting on Twitter or other social media.

The list includes comments about the electric-car company’s financial condition, earnings forecast, proposed acquisitions and production data. But it also covers remarks about “nonpublic legal or regulatory findings or decisions” and any event that Tesla would have to disclose to the S.E.C. in a regulatory filing.

A footnote to the settlement said, “This list is not intended to be an exhaustive list of topics,” meaning Mr. Musk is on notice to tread carefully when talking about anything that could move the company’s stock price.