KEY POINTS
  • Tesla CEO Elon Musk is showing that it may be difficult for Tesla's board to rein him in. 
  • Monitoring Musk's public communications is a key term of the deal he is trying to make with the SEC to settle fraud charges. 

Tesla CEO Elon Musk's recent tweet mocking federal regulators may be a sign that Tesla's board of directors can't control his behavior — no matter what the consequences, a former federal securities attorney said Monday.

Musk stoked more controversy last week when he sent out a tweet referring to the Securities and Exchange Commission as the "Shortseller Enrichment Commission" after settling fraud charges with the agency for making allegedly misleading statements about having the funding needed to take Tesla private.