NO. 28 OF 2012 (a) (b) National Intelligence Service [Rev. 2012] in the case of the Director-General, before the President; and in the case of every other member of the Service, before the DirectorGeneral. (2) The oath shall bind the Director-General and every member of the Service during and after expiry or termination of employment or engagement with the Service. 20. Certificate of appointment (1) The Director-General shall cause to be issued to a member of the Service on appointment, a certificate of appointment. (2) The certificate of appointment shall be in such form as the Director-General may prescribe by notice in the Gazette. (3) A member of the Service shall produce the certificate of appointment issued under subsection (1) on being requested to do so by any person in relation to whom that officer is exercising or is about to exercise a power conferred by this Act. (4) A member of the Service may, where necessary for the performance of his or her functions under this Act and with approval of the Director- General, carry and use an official firearm. 21. Scheme of service The Director-General shall, in consultation with the Public Service Commission and on the advice of the Salaries and Remuneration Commission prescribe a scheme of service setting out the terms and conditions of service for members of the Service which shall provide for— (a) appointments, confirmation of appointments, promotions, resignations, retirements and termination of appointment; (b) scales of salaries and allowances; and (c) the designations and grades of members of the Service. 22. Pension scheme and other benefits The Director-General— (a) shall with the approval of the Council establish— (i) a pension scheme for the members of the Service; and (ii) a medical scheme for the Service to provide for in-service and retirement medical benefits; and (b) may with the approval of the Council and subject to any written law, establish such other schemes as the Director-General may consider to be necessary. 23. Disciplinary Code (1) Subject to Articles 234(2) (g) and 47 of the Constitution, the Council shall, in consultation with the Public Service Commission, issue and maintain a disciplinary code for the Service which may— (a) prescribe disciplinary offences; [Issue 1] 20