Occupational Therapists Act Article 25

An occupational therapy institution shall designate suitable locations and personnel to keep records of occupational therapy and the diagnosis, counsels or prescriptions issued by physicians for at least 3 years.
中文原文 職能治療師法第25條
職能治療所對於職能治療紀錄、醫師開具之診斷、照會或醫囑,應指定適當場所及人員保管,並至少保存三年。

English translation for reference only; the Chinese text prevails. Not legal advice.