(1) "Severe disabling mental illness" means with respect to a person who is 18 or more years of age that the person meets the requirements of (1)(a), (b), (c), or (d). The person must also meet the requirements of (1)(e). The person:

(a) has been involuntarily hospitalized for at least 30 consecutive days because of a mental disorder at Montana State Hospital (Warm Springs campus) at least once;

(b) has recurrent thoughts of death, recurrent suicidal ideation, a suicide attempt, or a specific plan for committing suicide;

(c) has a DSM-IV-TR diagnosis of:

(i) schizophrenic disorder (295);

(ii) other psychotic disorder (293.81, 293.82, 295.40, 295.70, 297.1, 297.3, 298.9);

(iii) mood disorder (293.83, 296.22, 296.23, 296.24, 296.32, 296.33, 296.34, 296.40, 296.42, 296.43, 296.44, 296.52, 296.53, 296.54, 296.62, 296.63, 296.64, 296.7, 296.80, 296.89);

(iv) amnestic disorder (294.0, 294.8);

(v) disorder due to a general medical condition (293.0, 310.1);

(vi) pervasive developmental disorder not otherwise specified (299.80) when not accompanied by mental retardation;

(vii) anxiety disorder (300.01, 300.21, 300.3); or

(viii) posttraumatic stress disorder (309.81).

(d) has a DSM-IV-TR diagnosis of personality disorder (301.00, 301.20, 301.22, 301.4, 301.50, 301.6, 301.81, 301.82, 301.83, or 301.90); and

(e) has ongoing functioning difficulties because of the mental illness for a period of at least six months or for an obviously predictable period over six months, as indicated by at least two of the following:

(i) a medical professional with prescriptive authority has determined that medication is necessary to control the symptoms of mental illness;

(ii) the person is unable to work in a full-time competitive situation because of mental illness;

(iii) the person has been determined to be disabled due to mental illness by the social security administration;

(iv) the person maintains a living arrangement only with ongoing supervision, is homeless, or is at imminent risk of homelessness due to mental illness; or

(v) the person has had or will predictably have repeated episodes of decompensation.