Health and Safety Code §573.011

(a) An adult may file a written application for the emergency detention of another person. (b) The application must state: (1) that the applicant has reason to believe and does believe that the person evidences mental illness; (2) that the applicant has reason to believe and does believe that the person evidences a substantial risk of serious harm to himself or others; (3) a specific description of the risk of harm; (4) that the applicant has reason to believe and does believe that the risk of harm is imminent unless the person is immediately restrained; (5) that the applicant's beliefs are derived from specific recent behavior, overt acts, attempts, or threats; (6) a detailed description of the specific behavior, acts, attempts, or threats; and (7) a detailed description of the applicant's relationship to the person whose detention is sought. (c) The application may be accompanied by any relevant information.