Cal. Welf. & Inst. Code § 5170.3

Such evaluation facility shall require an application in writing stating the circumstances under which the person’s condition was called to the attention of the officer, member of the attending staff, or other designated person, and stating that the officer, member of the attending staff, or other designated person believes as a result of his personal observations that the person is, as a result of inebriation, a danger to others, or to himself, or gravely disabled or has violated subdivision (f) of Section 647 of the Penal Code.