Section fourteen of the Principal Act is repealed and the following section inserted in its stead:--
"14 . Contributions by the Commonwealth.
The Commonwealth shall pay into the Fund--
(a) in respect of a pension other than a pension under section nineteen A of this Act--an amount equal to seventy per centum of each amount of pension paid;
(b) in respect of a pension under section nineteen A of this Act--an amount equal to each amount of pension paid; and
(c) an amount equal to each amount paid to a person as the whole or a part of the Commonwealth supplement.".