Cal. Health & Safety Code § 32121.6

If a health care district enters into a written employment agreement with a hospital administrator, including a hospital administrator who is designated as a chief executive officer, the written employment agreement shall include all material terms and conditions agreed to between the district and the hospital administrator regarding compensation, deferred compensation, retirement benefits, severance or continuing compensation after termination of the agreement, vacation pay and other paid time off for illness or personal reasons, and other employment benefits that differ from those available to other full-time employees.