(a) Except as provided by subsection (b), the registrant or any other person may not disclose a client record required to be kept by the department, the Department of State Health Services, or another authorized agency.(b) The registrant or any other person may disclose a client record if:(1) the client or a person authorized to act on behalf of the client requests the record;(2) the department, the Texas Medical Board, a health authority, or an authorized agency requests the record;(3) the client consents in writing to disclosure of the record to another person;(4) the client is a victim, witness, or defendant in a criminal proceeding and the record is relevant to that proceeding;(5) the record is requested in a criminal or civil proceeding by court order or subpoena; or(6) disclosure is otherwise prohibited by law.