(3) The estimates prepared under clause (2) of this article shall be laid before Parliament by the President under clause (1) of this article without revision but with any recommendations that the Government may have on them. (4) At any time before Parliament considers the estimates of revenues and expenditure laid before it by or on the authority of the President, an appropriate committee of Parliament may discuss and review the estimates and make appropriate recommendations to Parliament. (5) Notwithstanding the provisions of clause (1) of this article, the President may cause to be prepared and laid before Parliament— (a) fiscal and monetary programmes and plans for economic and social development covering periods exceeding one year; (b) estimates of revenues and expenditure covering periods exceeding one year. (6) Parliament may make laws for giving effect to the provisions of this article. 156. Appropriation Bill. (1) The heads of expenditure contained in the estimates, other than expenditure charged on the Consolidated Fund by this Constitution or any Act of Parliament, shall be included in a bill to be known as an Appropriation Bill which shall be introduced into Parliament to provide for the issue from the Consolidated Fund of the sums necessary to meet that expenditure and the appropriation of those sums for the purposes specified in the bill. (2) (a) If in respect of any financial year it is found— that the amount appropriated for any purpose under the Appropriation Act is insufficient or that a need has arisen for expenditure for a purpose for which no amount has been appropriated by that Act; or (b) that any monies have been expended for any purpose in excess of the amount appropriated for that purpose or for a purpose for which no amount has been appropriated by that Act, a supplementary estimate showing the sums required or spent shall be laid down before Parliament and in the case of excess expenditure, within four months after the money is spent.