California Code, Government Code - GOV § 66637

(a) When the executive director determines that a person or governmental agency has undertaken, or is threatening to undertake, an activity that (1) may require a permit from the commission without securing a permit; or (2) may be inconsistent with a permit previously issued by the commission, the executive director may issue an order directing that person or governmental agency to cease and desist.

(b) A cease and desist order issued by the executive director may be subject to the terms and conditions that the executive director may determine are necessary to ensure compliance with this title, including the immediate removal of any fill or other material where that removal is necessary to avoid irreparable injury to an area within the jurisdiction of the commission pending action by the commission under Section 66638.

(c) A cease and desist order issued by the executive director shall become null and void 90 days after issuance.

(d) A cease and desist order issued by the executive director shall be effective upon the issuance thereof, and copies shall be served forthwith by certified mail upon the person or governmental agency being charged with the actual or threatened violation of this title.A copy of the cease and desist order shall also be sent by certified mail to the owner of the property on which the violation occurred.