Revance is incorporated in Delaware. In the Baker McKenzie guide in section 4.7 it says:
In Delaware, courts have stressed the importance of the board being adequately informed when negotiating the sale of control of the company. This generally requires that the target company's board:
-analyze the entire situation and evaluate the consideration being offered for control of the corporation in a disciplined and well documented manner; -receive financial and legal advice, negotiate diligently and ensure that it possesses all relevant material information; and -use methods or procedures that will enable the board to determine whether the consideration being provided to target company shareholders represents the best value reasonably available to the shareholders.