5. (1) The Government may, by notification in the official Gazette, direct that in such area as may be specified therein no petrol shall be sold or kept for sale except with an admixture of power alcohol. (2) The proportion of petrol and power alcohol in such mixture shall in any area and for any purpose be such as may from time to time be specified by the Government by notification in the official Gazette but such proportion of power alcohol in the case of mixture with petrol meant for use as motive power for any motor vehicle shall not be more than twenty-five per centum or less than five per centum by volume. (3) The power alcohol to be employed for such mixture shall be obtained from such distilleries as may from time to time be specified by the Government by notification in the official Gazette.