Cal. Business and Professions Code § 22945.5

(a) (1) A person may seek an order requiring a social media platform to remove content that includes an offer to transport, import into this state, sell, furnish, administer, or give away a controlled substance in violation of Section 11352 of the Health and Safety Code. (2) (A) If the social media platform has a reporting mechanism described in paragraph (4) of subdivision (b) of Section 22945, a person shall not bring an action pursuant to paragraph (1) until the person has notified the social media platform of the content and requested that it be removed through the reporting mechanism. (B) A person may bring an action pursuant to paragraph (1) before 48 hours have passed since providing notice to a social media platform through the reporting mechanism, but the court shall not rule on the request for an order until 48 hours have passed from the provision of notice. (C) The court may dismiss an action if the social media platform deletes the content relevant to the order sought pursuant to paragraph (1) before 48 hours have passed from the provision of notice under subparagraph (A). (3) If the social media platform does not have a reporting mechanism described in paragraph (4) of subdivision (b) of Section 22945, a person may bring an action under paragraph (1), and a court may rule on the request for an order, at any time. (b) (1) A court shall award court costs and reasonable attorney’s fees to a prevailing plaintiff in an action brought pursuant to this section. (2) Reasonable attorney’s fees may be awarded to a prevailing defendant upon a finding by the court that the plaintiff’s prosecution of the action was not in good faith.