§ 405. Duty of the department to the director of a hospital. The department shall notify the director of a hospital in advance of hearings to be held at such hospital as may be necessary to carry out the duties of the board of parole or the department. The department shall assist the department of mental hygiene in establishing or continuing the operation of grievance procedures at such hospital. Where the subject matter of the grievance primarily involves a policy or practice of the department of mental hygiene, the commissioner shall transfer the review of the grievance to the commissioner of mental hygiene for resolution pursuant to subdivision three of § 139 of the correction law.