Four-fifths of the net proceeds of the local rate levied in each district, after deducting the expenses of collection, shall, except as provided in section 68, be allotted to the district board established for that district under this Act.
     The remaining one-fifth shall be carried to the credit of the Local Government, and may--
         (a) be allotted by that Government to any district board established under this Act ; or
         (b) be applied by that Government to provide in the territories to which this Act extends, or any part thereof, for any of the matters on which district boards may expend the funds at their disposal under this Act :
     Provided that the Local Government may direct that the whole or any portion of the net proceeds of the local rate levied within the limits of any municipality or military cantonment,. after deducting the expenses collection, shall be carried to the credit of the municipal fund, or made available for the purpose of public improvement in the cantonment or for carrying out therein any rules made under section 25 of the Cantonments Act, 1880 (III of 11880), as the case may be.