Cal. Health and Safety Code § 129775

(a) Except as otherwise provided in subdivision (b), plans submitted pursuant to this chapter for work that affects structural elements shall contain an assessment of the nature of the site and potential for earthquake damage, based upon geologic and engineering investigations and reports by competent personnel of the causes of earthquake damage. One-story Type V wood frame or light steel frame, or light steel and wood frame construction of 4,000 square feet or less, shall be exempt from the provisions of this section, unless the project is within a special study zone established pursuant to Section 2622 of the Public Resources Code. (b) The requirements of subdivision (a) may be waived by the department when the department determines that these requirements for the proposed hospital project are unnecessary and would not be beneficial to the safety of the public. The department, after consultation with the Building Safety Board, shall adopt regulations defining the criteria upon which the determination of a waiver shall be made.