Where any person or body may, from time to time, exercise powers under this section on behalf of the Prisons Service Commission, in accordance with subsection (4), the Prisons Service Commission shall— (a) require that person or body to furnish reports in such manner or form as the Commission has specified in the directions by which it delegated those powers; (b) hear such complaints or appeals from persons with sufficient interest relating to the exercise of powers under this section and shall have the authority to— (i) quash the decision of a person or body exercising such powers; (ii) exercise such disciplinary powers with relation to such person or body, subject to the conditions laid down by an Act of Parliament; (iii) revoke directions delegating powers to any person or body: Provided that nothing in this section shall prejudice the right of any person who is the subject of a decision made by or on behalf of the Prisons Service Commission to appeal to the High Court or the right of any person with sufficient interest in such a decision to petition the High Court for judicial review of that decision.