Cal. Pub. Res. Code § 2774.4
(a) The board shall exercise some or all of a lead agency’s powers under this chapter pursuant to subdivision (c), except for permitting authority and vested rights determinations, if the board finds that a lead agency has done any of the following:
(c)
(2)
(B) At the hearing, the board shall determine if the lead agency has engaged in the conduct described in subdivision (a). If the board finds that the lead agency has engaged in conduct described in subdivision (a), the board shall do either of the following:
(e)
(1) If the board decides to take action pursuant to subdivision (a) and exercise some or all of a lead agency’s powers under this chapter, except for permitting authority and vested rights determinations, the board, based on the record of the public hearing, shall adopt written findings that explain all of the following: