18. —​(1) The Minister may, by notification in the Gazette, appoint any public officer to be a controller for the purposes of this Act. [  9​ /98]​ (2) The Minister shall, by notification in the Gazette, appoint from among the controllers a Chief Controller who shall exercise general supervision over the other controllers and all authorised officers and carry out such other duties as are assigned to him under this Act. [  9​ /98]​ (3) The Minister may also appoint any other public officer to be an authorised officer to assist any controller or the Chief Controller in the discharge of his duties under this Act. [  9​ /98]​ (4) In the exercise of their powers and in carrying out their duties under this Act, the Chief Controller and all controllers and authorised officers shall be guided by such general or special directions as may, from time to time, be given to them by the Minister. [13 [  9​ /98]​ Bar to legal proceedings 19.​ No legal proceedings whatsoever shall lie or be instituted or maintained in any court for or on account of any loss of or damage to any article or publication seized, detained, confiscated or destroyed under any provision of this Act, or for or on account of any delay in the delivery or return of the article or publication to the person to whom the article or publication would otherwise have been delivered or returned. [14 [  9​ /98]​ Appeals  20. —​(1) Any person aggrieved by the detention of any article or publication under ​section 15​ or ​16​ may appeal against such detention to the Minister whose decision  shall be final and shall not be called in question in any court. (2) No appeal under ​subsection (1)​ shall be allowed unless notice of appeal in writing together with the reasons for the appeal is given to the Minister within 14 days of the date of service of the notification referred to in ​subsection (3)​. [  9​ /98]​