9. Salaries and allowances and other terms and conditions of service of Chairman, Vice-Chairman and other Members.-The salaries and allowances payable to, and the other terms and conditions of service (including pension, gratuity and other retirement benefits) of, the Chairman, Vice-Chairman and other Members shall be such as may be prescribed:
Provided that neither the salary and allowances nor the other terms and conditions of service of the Chairman, Vice-Chairman or other member shall be varied to his disadvantage after his appointment.
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