An attorney representing Tesla shareholders argued Wednesday morning that a Chancery decision finding Tesla’s 2016 acquisition of SolarCity was acceptable leaves little in the acquisition process subject to Delaware’s entire fairness standard.

If the Delaware Supreme Court allows the decision in Elon Musk and the Tesla board’s favor to stand, argued Prickett, Jones & Elliott director Michael Hanrahan, it would substantially raise the threshold shareholders would need to meet to prove those involved in the deal-making process were acting in self-interest.