101. Supplementary and excess expenditure

If in respect of any financial year it is found—

that the amount appropriated by the Supply Act for any purpose is insufficient, or that a need has arisen for expenditure for a purpose for which no amount has been appropriated by the Supply Act; or

that any moneys have been expended for any purpose in excess of the amount (if any) appropriated for that purpose by the Supply Act, a supplementary estimate showing the sums required or spent shall be laid before the House of Representatives and the purposes of any such expenditure shall be included in a Supply Bill.