Bus. & Prof. Code, § 5354

(a) The applicant for any permit shall offer written evidence that both the owner or other person in control or possession of the property upon which the location is situated and the city or the county with land use jurisdiction over the property upon which the location is situated have consented to the placing of the advertising display.

(b) At the written request of the city or county with land use jurisdiction over the property upon which a location is situated, the department shall reserve the location and shall not issue a permit for that location to any applicant, other than the one specified in the request, in advance of receiving written evidence as provided in subdivision (a) and for a period of time not to exceed 90 days from the date the department received the request.

(c) In addition to the 90-day period set forth in subdivision (b), an additional period of 30 days may be granted at the discretion of the department upon any proof, satisfactory to the department and provided by the city or county making the original request for a 90-day period, of the existence of extenuating circumstances meriting an additional 30 days. There shall be a conclusive presumption in favor of the department that the granting or denial of the request for an additional 30 days was made in compliance with this subdivision.